diogo
/
yap-6.3
Archived
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
This repository has been archived on 2023-08-20. You can view files and clone it, but cannot push or open issues or pull requests.
yap-6.3/C/threads.c

1715 lines
44 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: stdpreds.c *
* Last rev: *
* mods: *
* comments: threads *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
/**
@ingroup Threads
@{
*/
#include "Yap.h"
#include "Yatom.h"
#include "YapHeap.h"
#include "eval.h"
#include "yapio.h"
#include "pl-shared.h"
#include <stdio.h>
#include <SWI-Prolog.h>
#if HAVE_STRING_H
#include <string.h>
#endif
#ifdef TABLING
#include "tab.macros.h"
#endif /* TABLING */
PL_blob_t PL_Message_Queue = {
PL_BLOB_MAGIC,
PL_BLOB_UNIQUE | PL_BLOB_NOCOPY,
"message_queue",
0, // release
0, // compare
0, // write
0 // acquire
};
#if DEBUG_LOCKS||DEBUG_PE_LOCKS
int debug_locks = FALSE, debug_pe_locks = FALSE;
static Int p_debug_locks( USES_REGS1 ) { debugf=stdout; debug_pe_locks = 1; return TRUE; }
static Int p_nodebug_locks( USES_REGS1 ) { debug_locks = 0; debug_pe_locks = 0; return TRUE; }
#endif
#if THREADS
#include "threads.h"
/*
* This file includes the definition of threads in Yap. Threads
* are supposed to be compatible with the SWI-Prolog thread package.
*
*/
static void
set_system_thread_id(int wid, PL_thread_info_t *info)
{
if (!info)
info = (PL_thread_info_t *)malloc(sizeof(PL_thread_info_t));
info = SWI_thread_info(wid, info);
info->tid = pthread_self();
info->has_tid = TRUE;
#ifdef HAVE_GETTID_SYSCALL
info->pid = syscall(__NR_gettid);
#else
#ifdef HAVE_GETTID_MACRO
info->pid = gettid();
#else
#ifdef __WINDOWS__
info->w32id = GetCurrentThreadId();
#endif
#endif
#endif
}
int
Yap_ThreadID( void )
{
int new_worker_id = 0;
pthread_t self = pthread_self();
while(new_worker_id < MAX_THREADS &&
Yap_local[new_worker_id] &&
(REMOTE_ThreadHandle(new_worker_id).in_use == TRUE ||
REMOTE_ThreadHandle(new_worker_id).zombie == TRUE) ) {
if (pthread_equal(self , REMOTE_ThreadHandle(new_worker_id).pthread_handle) ) {
return new_worker_id;
}
new_worker_id++;
}
return -1;
}
int
Yap_NOfThreads(void) {
// GLOBAL_ThreadHandlesLock is held
return GLOBAL_NOfThreads;
}
static int
allocate_new_tid(void)
{
int new_worker_id = 0;
LOCK(GLOBAL_ThreadHandlesLock);
while(new_worker_id < MAX_THREADS &&
Yap_local[new_worker_id] &&
(REMOTE_ThreadHandle(new_worker_id).in_use == TRUE ||
REMOTE_ThreadHandle(new_worker_id).zombie == TRUE) )
new_worker_id++;
if (new_worker_id >= MAX_THREADS) {
new_worker_id = -1;
} else if (!Yap_local[new_worker_id]) {
if (!Yap_InitThread(new_worker_id)) {
UNLOCK(GLOBAL_ThreadHandlesLock);
return -1;
}
MUTEX_LOCK(&(REMOTE_ThreadHandle(new_worker_id).tlock));
REMOTE_ThreadHandle(new_worker_id).in_use = TRUE;
} else if (new_worker_id < MAX_THREADS) {
// reuse existing thread
MUTEX_LOCK(&(REMOTE_ThreadHandle(new_worker_id).tlock));
REMOTE_ThreadHandle(new_worker_id).in_use = TRUE;
} else {
new_worker_id = -1;
}
UNLOCK(GLOBAL_ThreadHandlesLock);
return new_worker_id;
}
static bool
mboxCreate( Term namet, mbox_t *mboxp USES_REGS )
{
pthread_mutex_t *mutexp;
pthread_cond_t *condp;
struct idb_queue *msgsp;
memset(mboxp, 0, sizeof(mbox_t));
condp = & mboxp->cond;
pthread_cond_init(condp, NULL);
mutexp = & mboxp->mutex;
pthread_mutex_init(mutexp, NULL);
msgsp = & mboxp->msgs;
mboxp->nmsgs = 0;
mboxp->nclients = 0;
Yap_init_tqueue(msgsp);
// match at the end, when everything is built.
mboxp->name = namet;
mboxp->open = true;
return true;
}
static bool
mboxDestroy( mbox_t *mboxp USES_REGS )
{
pthread_mutex_t *mutexp = &mboxp->mutex;
pthread_cond_t *condp = &mboxp->cond;
struct idb_queue *msgsp = &mboxp->msgs;
mboxp->open = false;
if (mboxp->nclients == 0 ) {
pthread_cond_destroy(condp);
pthread_mutex_destroy(mutexp);
Yap_destroy_tqueue(msgsp PASS_REGS);
// at this point, there is nothing left to unlock!
return true;
} else {
/* we have clients in the mailbox, try to wake them up one by one */
pthread_cond_broadcast(condp);
pthread_mutex_unlock(mutexp);
return true;
}
}
static bool
mboxSend( mbox_t *mboxp, Term t USES_REGS )
{
pthread_mutex_t *mutexp = &mboxp->mutex;
pthread_cond_t *condp = &mboxp->cond;
struct idb_queue *msgsp = &mboxp->msgs;
if (!mboxp->open) {
// oops, dead mailbox
return false;
}
Yap_enqueue_tqueue(msgsp, t PASS_REGS);
// printf("+ (%d) %d/%d\n", worker_id,mboxp->nclients, mboxp->nmsgs);
mboxp->nmsgs++;
pthread_cond_broadcast(condp);
pthread_mutex_unlock(mutexp);
return true;
}
static bool
mboxReceive( mbox_t *mboxp, Term t USES_REGS )
{
pthread_mutex_t *mutexp = &mboxp->mutex;
pthread_cond_t *condp = &mboxp->cond;
struct idb_queue *msgsp = &mboxp->msgs;
bool rc;
if (!mboxp->open){
return false; // don't try to read if someone else already closed down...
}
mboxp->nclients++;
do {
rc = mboxp->nmsgs && Yap_dequeue_tqueue(msgsp, t, false, true PASS_REGS);
if (rc) {
mboxp->nclients--;
mboxp->nmsgs--;
//printf("- (%d) %d/%d\n", worker_id,mboxp->nclients, mboxp->nmsgs);
// Yap_do_low_level_trace=1;
pthread_mutex_unlock(mutexp);
return true;
} else if (!mboxp->open) {
//printf("o (%d)\n", worker_id);
mboxp->nclients--;
if (!mboxp->nclients) {// release
pthread_cond_destroy(condp);
pthread_mutex_destroy(mutexp);
Yap_destroy_tqueue(msgsp PASS_REGS);
// at this point, there is nothing left to unlock!
} else {
pthread_cond_broadcast(condp);
pthread_mutex_unlock(mutexp);
}
return false;
} else {
pthread_cond_wait(condp, mutexp);
}
} while (!rc);
return rc;
}
static bool
mboxPeek( mbox_t *mboxp, Term t USES_REGS )
{
pthread_mutex_t *mutexp = &mboxp->mutex;
struct idb_queue *msgsp = &mboxp->msgs;
bool rc = Yap_dequeue_tqueue(msgsp, t, false, false PASS_REGS);
pthread_mutex_unlock(mutexp);
return rc;
}
static int
store_specs(int new_worker_id, UInt ssize, UInt tsize, UInt sysize, Term tgoal, Term tdetach, Term texit)
{
CACHE_REGS
UInt pm; /* memory to be requested */
Term tmod;
if (tsize < MinTrailSpace)
tsize = MinTrailSpace;
if (ssize < MinStackSpace)
ssize = MinStackSpace;
REMOTE_ThreadHandle(new_worker_id).ssize = ssize;
REMOTE_ThreadHandle(new_worker_id).tsize = tsize;
REMOTE_ThreadHandle(new_worker_id).sysize = sysize;
if ((REGSTORE *)pthread_getspecific(Yap_yaamregs_key)) {
REMOTE_c_input_stream(new_worker_id) = LOCAL_c_input_stream;
REMOTE_c_output_stream(new_worker_id) = LOCAL_c_output_stream;
REMOTE_c_error_stream(new_worker_id) = LOCAL_c_error_stream;
} else {
// thread is created by a thread that has never run Prolog
REMOTE_c_input_stream(new_worker_id) = REMOTE_c_input_stream(0);
REMOTE_c_output_stream(new_worker_id) = REMOTE_c_output_stream(0);
REMOTE_c_error_stream(new_worker_id) = REMOTE_c_error_stream(0);
}
pm = (ssize + tsize)*K1;
if (!(REMOTE_ThreadHandle(new_worker_id).stack_address = malloc(pm))) {
return FALSE;
}
REMOTE_ThreadHandle(new_worker_id).tgoal =
Yap_StoreTermInDB(Deref(tgoal), 7);
if (CurrentModule) {
REMOTE_ThreadHandle(new_worker_id).cmod =
CurrentModule;
} else {
REMOTE_ThreadHandle(new_worker_id).cmod = USER_MODULE;
}
tdetach = Deref(tdetach);
if (IsVarTerm(tdetach)){
REMOTE_ThreadHandle(new_worker_id).tdetach =
MkAtomTerm(AtomFalse);
} else {
REMOTE_ThreadHandle(new_worker_id).tdetach =
tdetach;
}
tmod = CurrentModule;
texit = Yap_StripModule(Deref(texit), &tmod);
if (IsAtomTerm(tmod)) {
REMOTE_ThreadHandle(new_worker_id).texit_mod = tmod;
} else {
Yap_Error(TYPE_ERROR_ATOM,tmod,"module in exit call should be an atom");
}
REMOTE_ThreadHandle(new_worker_id).texit =
Yap_StoreTermInDB(texit,7);
REMOTE_ThreadHandle(new_worker_id).local_preds =
NULL;
REMOTE_ThreadHandle(new_worker_id).start_of_timesp =
NULL;
REMOTE_ThreadHandle(new_worker_id).last_timep =
NULL;
REMOTE_ScratchPad(new_worker_id).ptr =
NULL;
// reset arena info
REMOTE_GlobalArena(new_worker_id) =0;
return TRUE;
}
static void
kill_thread_engine (int wid, int always_die)
{
Prop p0 = AbsPredProp(REMOTE_ThreadHandle(wid).local_preds);
GlobalEntry *gl = REMOTE_GlobalVariables(wid);
REMOTE_ThreadHandle(wid).local_preds = NIL;
REMOTE_GlobalVariables(wid) = NULL;
/* kill all thread local preds */
while(p0) {
PredEntry *ap = RepPredProp(p0);
p0 = ap->NextOfPE;
Yap_Abolish(ap);
Yap_FreeCodeSpace((char *)ap);
}
while (gl) {
gl->global = TermFoundVar;
gl = gl->NextGE;
}
Yap_KillStacks(wid);
REMOTE_Signals(wid) = 0L;
// must be done before relessing the memory used to store
// thread local time.
if (!always_die) {
/* called by thread itself */
GLOBAL_ThreadsTotalTime += Yap_cputime();
}
if (REMOTE_ScratchPad(wid).ptr)
free(REMOTE_ScratchPad(wid).ptr);
REMOTE_PL_local_data_p(wid)->reg_cache =
REMOTE_ThreadHandle(wid).current_yaam_regs = NULL;
if (REMOTE_ThreadHandle(wid).start_of_timesp)
free(REMOTE_ThreadHandle(wid).start_of_timesp);
if (REMOTE_ThreadHandle(wid).last_timep)
free(REMOTE_ThreadHandle(wid).last_timep);
if (REMOTE_ThreadHandle(wid).texit) {
Yap_FreeCodeSpace((ADDR)REMOTE_ThreadHandle(wid).texit);
}
/* FreeCodeSpace requires LOCAL requires yaam_regs */
free(REMOTE_ThreadHandle(wid).default_yaam_regs);
REMOTE_ThreadHandle(wid).default_yaam_regs = NULL;
LOCK(GLOBAL_ThreadHandlesLock);
GLOBAL_NOfThreads--;
UNLOCK(GLOBAL_ThreadHandlesLock);
MUTEX_LOCK(&(REMOTE_ThreadHandle(wid).tlock));
if (REMOTE_ThreadHandle(wid).tdetach == MkAtomTerm(AtomTrue) ||
always_die) {
REMOTE_ThreadHandle(wid).zombie = FALSE;
REMOTE_ThreadHandle(wid).in_use = FALSE;
}
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
}
static void
thread_die(int wid, int always_die)
{
kill_thread_engine(wid, always_die);
}
static int
setup_engine(int myworker_id, int init_thread)
{
CACHE_REGS
REGSTORE *standard_regs;
set_system_thread_id( myworker_id, NULL );
standard_regs = (REGSTORE *)calloc(1,sizeof(REGSTORE));
if (!standard_regs)
return FALSE;
regcache = standard_regs;
/* create the YAAM descriptor */
REMOTE_ThreadHandle(myworker_id).default_yaam_regs = standard_regs;
REMOTE_ThreadHandle(myworker_id).current_yaam_regs = standard_regs;
REMOTE_PL_local_data_p(myworker_id)->reg_cache = standard_regs;
Yap_InitExStacks(myworker_id, REMOTE_ThreadHandle(myworker_id).tsize, REMOTE_ThreadHandle(myworker_id).ssize);
REMOTE_SourceModule(myworker_id) = CurrentModule = REMOTE_ThreadHandle(myworker_id).cmod;
// create a mbox
mboxCreate( MkIntTerm(myworker_id), &REMOTE_ThreadHandle(myworker_id).mbox_handle PASS_REGS );
Yap_InitTime( myworker_id );
Yap_InitYaamRegs( myworker_id );
REFRESH_CACHE_REGS
Yap_ReleasePreAllocCodeSpace(Yap_PreAllocCodeSpace());
/* I exist */
GLOBAL_NOfThreadsCreated++;
GLOBAL_NOfThreads++;
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(myworker_id).tlock));
#ifdef TABLING
new_dependency_frame(REMOTE_top_dep_fr(myworker_id), FALSE, NULL, NULL, B, NULL, FALSE, NULL); /* same as in Yap_init_root_frames() */
#endif /* TABLING */
return TRUE;
}
static void
start_thread(int myworker_id)
{
CACHE_REGS
pthread_setspecific(Yap_yaamregs_key, (void *)REMOTE_ThreadHandle(myworker_id).default_yaam_regs);
REFRESH_CACHE_REGS;
worker_id = myworker_id;
LOCAL = REMOTE(myworker_id);
}
static void *
thread_run(void *widp)
{
CACHE_REGS
Term tgoal, t;
Term tgs[2];
int myworker_id = *((int *)widp);
#ifdef OUTPUT_THREADS_TABLING
char thread_name[25];
char filename[YAP_FILENAME_MAX];
sprintf(thread_name, "/thread_output_%d", myworker_id);
strcpy(filename, YAP_BINDIR);
strncat(filename, thread_name, 25);
REMOTE_thread_output(myworker_id) = fopen(filename, "w");
#endif /* OUTPUT_THREADS_TABLING */
start_thread(myworker_id);
REFRESH_CACHE_REGS;
do {
t = tgs[0] = Yap_PopTermFromDB(LOCAL_ThreadHandle.tgoal);
if (t == 0) {
if (LOCAL_Error_TYPE == OUT_OF_ATTVARS_ERROR) {
LOCAL_Error_TYPE = YAP_NO_ERROR;
if (!Yap_growglobal(NULL)) {
Yap_Error(OUT_OF_ATTVARS_ERROR, TermNil, LOCAL_ErrorMessage);
thread_die(worker_id, FALSE);
return NULL;
}
} else {
LOCAL_Error_TYPE = YAP_NO_ERROR;
if (!Yap_growstack(LOCAL_ThreadHandle.tgoal->NOfCells*CellSize)) {
Yap_Error(OUT_OF_STACK_ERROR, TermNil, LOCAL_ErrorMessage);
thread_die(worker_id, FALSE);
return NULL;
}
}
}
} while (t == 0);
REMOTE_ThreadHandle(myworker_id).tgoal = NULL;
tgs[1] = LOCAL_ThreadHandle.tdetach;
tgoal = Yap_MkApplTerm(FunctorThreadRun, 2, tgs);
Yap_RunTopGoal(tgoal);
#ifdef TABLING
{
tab_ent_ptr tab_ent;
tab_ent = GLOBAL_root_tab_ent;
while (tab_ent) {
abolish_table(tab_ent);
tab_ent = TabEnt_next(tab_ent);
}
FREE_DEPENDENCY_FRAME(REMOTE_top_dep_fr(worker_id));
REMOTE_top_dep_fr(worker_id) = NULL;
#ifdef USE_PAGES_MALLOC
DETACH_PAGES(_pages_void);
#endif /* USE_PAGES_MALLOC */
DETACH_PAGES(_pages_tab_ent);
#if defined(THREADS_FULL_SHARING) || defined(THREADS_CONSUMER_SHARING)
DETACH_PAGES(_pages_sg_ent);
#endif /* THREADS_FULL_SHARING || THREADS_CONSUMER_SHARING */
DETACH_PAGES(_pages_sg_fr);
DETACH_PAGES(_pages_dep_fr);
DETACH_PAGES(_pages_sg_node);
DETACH_PAGES(_pages_sg_hash);
DETACH_PAGES(_pages_ans_node);
DETACH_PAGES(_pages_ans_hash);
#if defined(THREADS_FULL_SHARING)
DETACH_PAGES(_pages_ans_ref_node);
#endif /* THREADS_FULL_SHARING */
DETACH_PAGES(_pages_gt_node);
DETACH_PAGES(_pages_gt_hash);
#ifdef OUTPUT_THREADS_TABLING
fclose(LOCAL_thread_output);
#endif /* OUTPUT_THREADS_TABLING */
}
#endif /* TABLING */
thread_die(worker_id, FALSE);
return NULL;
}
static Int
p_thread_new_tid( USES_REGS1 )
{
int new_worker = allocate_new_tid();
if (new_worker == -1) {
Yap_Error(RESOURCE_ERROR_MAX_THREADS, MkIntegerTerm(MAX_THREADS), "");
return FALSE;
}
return Yap_unify(MkIntegerTerm(new_worker), ARG1);
}
static int
init_thread_engine(int new_worker_id, UInt ssize, UInt tsize, UInt sysize, Term tgoal, Term tdetach, Term texit)
{
return store_specs(new_worker_id, ssize, tsize, sysize, tgoal, tdetach, texit);
}
static Int
p_create_thread( USES_REGS1 )
{
UInt ssize;
UInt tsize;
UInt sysize;
Term x2 = Deref(ARG2);
Term x3 = Deref(ARG3);
Term x4 = Deref(ARG4);
int new_worker_id = IntegerOfTerm(Deref(ARG7)),
owid = worker_id;
// fprintf(stderr," %d --> %d\n", worker_id, new_worker_id);
if (IsBigIntTerm(x2))
return FALSE;
if (IsBigIntTerm(x3))
return FALSE;
ssize = IntegerOfTerm(x2);
tsize = IntegerOfTerm(x3);
sysize = IntegerOfTerm(x4);
/* UInt systemsize = IntegerOfTerm(Deref(ARG4)); */
if (new_worker_id == -1) {
/* YAP ERROR */
return FALSE;
}
/* make sure we can proceed */
if (!init_thread_engine(new_worker_id, ssize, tsize, sysize, ARG1, ARG5, ARG6))
return FALSE;
//REMOTE_ThreadHandle(new_worker_id).pthread_handle = 0L;
REMOTE_ThreadHandle(new_worker_id).id = new_worker_id;
REMOTE_ThreadHandle(new_worker_id).ref_count = 1;
setup_engine(new_worker_id, FALSE);
if ((REMOTE_ThreadHandle(new_worker_id).ret = pthread_create(&REMOTE_ThreadHandle(new_worker_id).pthread_handle, NULL, thread_run, (void *)(&(REMOTE_ThreadHandle(new_worker_id).id)))) == 0) {
pthread_setspecific(Yap_yaamregs_key, (const void *)REMOTE_ThreadHandle(owid).current_yaam_regs);
/* wait until the client is initialised */
return TRUE;
}
pthread_setspecific(Yap_yaamregs_key, (const void *)REMOTE_ThreadHandle(owid).current_yaam_regs);
return FALSE;
}
static Int
p_thread_sleep( USES_REGS1 )
{
UInt time = IntegerOfTerm(Deref(ARG1));
#if HAVE_NANOSLEEP
UInt ntime = IntegerOfTerm(Deref(ARG2));
struct timespec req, oreq ;
req.tv_sec = time;
req.tv_nsec = ntime;
if (nanosleep(&req, &oreq)) {
#if HAVE_STRERROR
Yap_Error(OPERATING_SYSTEM_ERROR, ARG1, "%s in thread_sleep/1", strerror(errno));
#else
Yap_Error(OPERATING_SYSTEM_ERROR, ARG1, "error %d in thread_sleep/1", errno);
#endif
return FALSE;
}
return Yap_unify(ARG3,MkIntegerTerm(oreq.tv_sec)) &&
Yap_unify(ARG4,MkIntegerTerm(oreq.tv_nsec));
#elif HAVE_SLEEP
UInt rtime;
if ((rtime = sleep(time)) < 0) {
#if HAVE_STRERROR
Yap_Error(OPERATING_SYSTEM_ERROR, ARG1, "%s in thread_sleep/1", strerror(errno));
#else
Yap_Error(OPERATING_SYSTEM_ERROR, ARG1, "error %d in thread_sleep/1", errno);
#endif
}
return Yap_unify(ARG3,MkIntegerTerm(rtime)) &&
Yap_unify(ARG4,MkIntTerm(0L));
#else
Yap_Error(OPERATING_SYSTEM_ERROR, ARG1, "no support for thread_sleep/1 in this YAP configuration");
#endif
}
static Int
p_thread_self( USES_REGS1 )
{
if (pthread_getspecific(Yap_yaamregs_key) == NULL)
return Yap_unify(MkIntegerTerm(-1), ARG1);
return Yap_unify(MkIntegerTerm(worker_id), ARG1);
}
static Int
p_thread_zombie_self( USES_REGS1 )
{
/* make sure the lock is available */
if (pthread_getspecific(Yap_yaamregs_key) == NULL)
return Yap_unify(MkIntegerTerm(-1), ARG1);
if (Yap_has_signal( YAP_ITI_SIGNAL )) {
return FALSE;
}
// fprintf(stderr," -- %d\n", worker_id);
LOCAL_ThreadHandle.in_use = FALSE;
LOCAL_ThreadHandle.zombie = TRUE;
MUTEX_UNLOCK(&(LOCAL_ThreadHandle.tlock));
return Yap_unify(MkIntegerTerm(worker_id), ARG1);
}
static Int
p_thread_status_lock( USES_REGS1 )
{
/* make sure the lock is available */
if (pthread_getspecific(Yap_yaamregs_key) == NULL)
return FALSE;
MUTEX_LOCK(&(LOCAL_ThreadHandle.tlock_status));
return Yap_unify(MkIntegerTerm(worker_id), ARG1);
}
static Int
p_thread_status_unlock( USES_REGS1 )
{
/* make sure the lock is available */
if (pthread_getspecific(Yap_yaamregs_key) == NULL)
return FALSE;
MUTEX_UNLOCK(&(LOCAL_ThreadHandle.tlock_status));
return Yap_unify(MkIntegerTerm(worker_id), ARG1);
}
Int
Yap_thread_self(void)
{
CACHE_REGS
if (pthread_getspecific(Yap_yaamregs_key) == NULL)
return -1;
return worker_id;
}
CELL
Yap_thread_create_engine(YAP_thread_attr *ops)
{
YAP_thread_attr opsv;
int new_id = allocate_new_tid();
Term t = TermNil;
/*
ok, this creates a problem, because we are initializing an engine from
some "empty" thread.
We need first to fool the thread into believing it is the main thread
*/
if (new_id == -1) {
/* YAP ERROR */
return -1;
}
if (ops == NULL) {
ops = &opsv;
ops->tsize = DefHeapSpace;
ops->ssize = DefStackSpace;
ops->sysize = 0;
ops->egoal = t;
}
if (!pthread_equal(pthread_self() , GLOBAL_master_thread) ) {
/* we are worker_id 0 for now, lock master thread so that no one messes with us */
pthread_setspecific(Yap_yaamregs_key, (const void *)&Yap_standard_regs);
MUTEX_LOCK(&(REMOTE_ThreadHandle(0).tlock));
}
if (!init_thread_engine(new_id, ops->ssize, ops->tsize, ops->sysize, t, t, (ops->egoal)))
return -1;
//REMOTE_ThreadHandle(new_id).pthread_handle = 0L;
REMOTE_ThreadHandle(new_id).id = new_id;
REMOTE_ThreadHandle(new_id).ref_count = 0;
if (!setup_engine(new_id, FALSE))
return -1;
if (!pthread_equal(pthread_self(), GLOBAL_master_thread)) {
pthread_setspecific(Yap_yaamregs_key, NULL);
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(0).tlock));
}
return new_id;
}
Int
Yap_thread_attach_engine(int wid)
{
/*
already locked
MUTEX_LOCK(&(REMOTE_ThreadHandle(wid).tlock));
*/
if (REMOTE_ThreadHandle(wid).ref_count ) {
REMOTE_ThreadHandle(wid).ref_count++;
REMOTE_ThreadHandle(wid).pthread_handle = pthread_self();
set_system_thread_id(wid, SWI_thread_info(wid, NULL));
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return TRUE;
}
REMOTE_ThreadHandle(wid).pthread_handle = pthread_self();
set_system_thread_id(wid, SWI_thread_info(wid, NULL));
REMOTE_ThreadHandle(wid).ref_count++;
pthread_setspecific(Yap_yaamregs_key, (const void *)REMOTE_ThreadHandle(wid).current_yaam_regs);
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return TRUE;
}
Int
Yap_thread_detach_engine(int wid)
{
MUTEX_LOCK(&(REMOTE_ThreadHandle(wid).tlock));
//REMOTE_ThreadHandle(wid).pthread_handle = 0;
REMOTE_ThreadHandle(wid).ref_count--;
pthread_setspecific(Yap_yaamregs_key, NULL);
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return TRUE;
}
Int
Yap_thread_destroy_engine(int wid)
{
MUTEX_LOCK(&(REMOTE_ThreadHandle(wid).tlock));
if (REMOTE_ThreadHandle(wid).ref_count == 0) {
kill_thread_engine(wid, TRUE);
return TRUE;
} else {
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return FALSE;
}
}
static Int
p_thread_join( USES_REGS1 )
{
Int tid = IntegerOfTerm(Deref(ARG1));
pthread_t thread;
MUTEX_LOCK(&(REMOTE_ThreadHandle(tid).tlock));
if (!(REMOTE_ThreadHandle(tid).in_use ||
REMOTE_ThreadHandle(tid).zombie)) {
// he's dead, jim
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return FALSE;
}
if (!REMOTE_ThreadHandle(tid).tdetach == MkAtomTerm(AtomTrue)) {
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return FALSE;
}
thread = REMOTE_ThreadHandle(tid).pthread_handle;
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
/* make sure this lock is accessible */
if (pthread_join(thread, NULL) < 0) {
/* ERROR */
return FALSE;
}
return TRUE;
}
static Int
p_thread_destroy( USES_REGS1 )
{
Int tid = IntegerOfTerm(Deref(ARG1));
MUTEX_LOCK(&(REMOTE_ThreadHandle(tid).tlock));
REMOTE_ThreadHandle(tid).zombie = FALSE;
REMOTE_ThreadHandle(tid).in_use = FALSE;
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return TRUE;
}
static Int
p_thread_detach( USES_REGS1 )
{
Int tid = IntegerOfTerm(Deref(ARG1));
MUTEX_LOCK(&(REMOTE_ThreadHandle(tid).tlock));
if (pthread_detach(REMOTE_ThreadHandle(tid).pthread_handle) < 0) {
/* ERROR */
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return FALSE;
}
REMOTE_ThreadHandle(tid).tdetach =
MkAtomTerm(AtomTrue);
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return TRUE;
}
static Int
p_thread_detached( USES_REGS1 )
{
if (LOCAL_ThreadHandle.tdetach)
return Yap_unify(ARG1,LOCAL_ThreadHandle.tdetach);
else
return FALSE;
}
static Int
p_thread_detached2( USES_REGS1 )
{
Int tid = IntegerOfTerm(Deref(ARG1));
if (REMOTE_ThreadHandle(tid).tdetach)
return Yap_unify(ARG2,REMOTE_ThreadHandle(tid).tdetach);
else
return FALSE;
}
static Int
p_thread_exit( USES_REGS1 )
{
thread_die(worker_id, FALSE);
pthread_exit(NULL);
/* done, just make gcc happy */
return TRUE;
}
static Int
p_thread_set_concurrency( USES_REGS1 )
{
Term tnew = Deref(ARG2);
int newc;
#if HAVE_PTHREAD_GETCONCURRENCY
int cur;
#endif
if (IsVarTerm(tnew)) {
newc = 0;
} else if (IsIntegerTerm(tnew)) {
newc = IntegerOfTerm(tnew);
} else {
Yap_Error(TYPE_ERROR_INTEGER,tnew,"thread_set_concurrency/2");
return(FALSE);
}
#if HAVE_PTHREAD_GETCONCURRENCY
cur = MkIntegerTerm(pthread_getconcurrency());
if (pthread_setconcurrency(newc) != 0) {
return FALSE;
}
return Yap_unify(ARG1, MkIntegerTerm(cur));
#else
return FALSE;
#endif
}
static Int
p_thread_yield( USES_REGS1 )
{
if (sched_yield() != 0) {
return FALSE;
}
return TRUE;
}
static Int
p_valid_thread( USES_REGS1 )
{
Int i = IntegerOfTerm(Deref(ARG1));
return REMOTE_ThreadHandle(i).in_use || REMOTE_ThreadHandle(i).zombie;
}
/* Mutex Support */
typedef struct swi_mutex {
UInt owners;
Int tid_own;
pthread_mutex_t m;
} SWIMutex;
static Int
p_new_mutex( USES_REGS1 )
{
SWIMutex* mutp;
pthread_mutexattr_t mat;
#if defined(HAVE_PTHREAD_MUTEXATTR_SETKIND_NP) && !defined(__MINGW32__)
extern int pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);
#endif
mutp = (SWIMutex *)Yap_AllocCodeSpace(sizeof(SWIMutex));
if (mutp == NULL) {
return FALSE;
}
pthread_mutexattr_init(&mat);
#if defined(HAVE_PTHREAD_MUTEXATTR_SETKIND_NP) && !defined(__MINGW32__)
pthread_mutexattr_setkind_np(&mat, PTHREAD_MUTEX_RECURSIVE_NP);
#else
#ifdef HAVE_PTHREAD_MUTEXATTR_SETTYPE
pthread_mutexattr_settype(&mat, PTHREAD_MUTEX_RECURSIVE);
#endif
#endif
pthread_mutex_init(&mutp->m, &mat);
mutp->owners = 0;
mutp->tid_own = 0;
return Yap_unify(ARG1, MkIntegerTerm((Int)mutp));
}
static Int
p_destroy_mutex( USES_REGS1 )
{
SWIMutex *mut = (SWIMutex*)IntegerOfTerm(Deref(ARG1));
if (pthread_mutex_destroy(&mut->m) < 0)
return FALSE;
Yap_FreeCodeSpace((void *)mut);
return TRUE;
}
static Int
p_lock_mutex( USES_REGS1 )
{
SWIMutex *mut = (SWIMutex*)IntegerOfTerm(Deref(ARG1));
#if DEBUG_LOCKS
MUTEX_LOCK(&mut->m);
#else
if (MUTEX_LOCK(&mut->m) < 0)
return FALSE;
#endif
mut->owners++;
mut->tid_own = worker_id;
return TRUE;
}
static Int
p_trylock_mutex( USES_REGS1 )
{
SWIMutex *mut = (SWIMutex*)IntegerOfTerm(Deref(ARG1));
if (MUTEX_TRYLOCK(&mut->m) == EBUSY)
return FALSE;
mut->owners++;
mut->tid_own = worker_id;
return TRUE;
}
static Int
p_unlock_mutex( USES_REGS1 )
{
SWIMutex *mut = (SWIMutex*)IntegerOfTerm(Deref(ARG1));
#if DEBUG_LOCKS
MUTEX_UNLOCK(&mut->m);
#else
if (MUTEX_UNLOCK(&mut->m) < 0)
return FALSE;
#endif
mut->owners--;
return TRUE;
}
static Int
p_with_mutex( USES_REGS1 )
{
SWIMutex *mut;
Term t1 = Deref(ARG1), excep;
Int rc = FALSE;
Int creeping = Yap_get_signal(YAP_CREEP_SIGNAL);
PredEntry *pe;
Term tm = CurrentModule;
Term tg = Deref(ARG2);
if (IsVarTerm(t1)) {
p_new_mutex( PASS_REGS1 );
t1 = Deref(ARG1);
}
mut = (SWIMutex*)IntegerOfTerm(t1);
if (!p_lock_mutex( PASS_REGS1 )) {
return FALSE;
}
tg = Yap_StripModule(tg, &tm);
if (IsVarTerm(tg)) {
Yap_Error(INSTANTIATION_ERROR, ARG2, "with_mutex/2");
goto end;
} else if (IsApplTerm(tg)) {
register Functor f = FunctorOfTerm(tg);
register CELL *pt;
size_t i, arity;
f = FunctorOfTerm(tg);
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, tg, "with_mutex/2");
goto end;
}
arity = ArityOfFunctor(f);
if (arity > MaxTemps) {
Yap_Error(TYPE_ERROR_CALLABLE, tg, "with_mutex/2");
goto end;
}
pe = RepPredProp(PredPropByFunc(f, tm));
pt = RepAppl(tg)+1;
for (i= 0; i < arity; i++ )
XREGS[i+1] = pt[i];
} else if (IsAtomTerm(tg)) {
pe = RepPredProp(PredPropByAtom(AtomOfTerm(tg), tm));
} else if (IsPairTerm(tg)) {
register CELL *pt;
Functor f;
f = FunctorDot;
pe = RepPredProp(PredPropByFunc(f, tm));
pt = RepPair(tg);
XREGS[1] = pt[0];
XREGS[2] = pt[1];
} else {
Yap_Error(TYPE_ERROR_CALLABLE, tg, "with_mutex/2");
goto end;
}
if (
pe->OpcodeOfPred != FAIL_OPCODE &&
Yap_execute_pred(pe, NULL PASS_REGS) ) {
rc = TRUE;
}
end:
ARG1 = MkIntegerTerm((Int)mut);
excep = Yap_GetException();
p_unlock_mutex( PASS_REGS1 );
if (creeping) {
Yap_signal( YAP_CREEP_SIGNAL );
} else if ( excep != 0) {
return Yap_JumpToEnv(excep);
}
return rc;
}
static Int
p_with_with_mutex( USES_REGS1 )
{
if (GLOBAL_WithMutex == NULL) {
p_new_mutex( PASS_REGS1 );
GLOBAL_WithMutex = (SWIMutex*)IntegerOfTerm(Deref(ARG1));
} else {
ARG1 = MkIntegerTerm((Int)GLOBAL_WithMutex);
}
return p_lock_mutex( PASS_REGS1 );
}
static Int
p_unlock_with_mutex( USES_REGS1 )
{
ARG1 = MkIntegerTerm((Int)GLOBAL_WithMutex);
return p_unlock_mutex( PASS_REGS1 );
}
static Int
p_mutex_info( USES_REGS1 )
{
SWIMutex *mut = (SWIMutex*)IntegerOfTerm(Deref(ARG1));
return Yap_unify(ARG2, MkIntegerTerm(mut->owners)) &&
Yap_unify(ARG3, MkIntegerTerm(mut->tid_own));
return TRUE;
}
static Int
p_cond_create( USES_REGS1 )
{
pthread_cond_t* condp;
condp = (pthread_cond_t *)Yap_AllocCodeSpace(sizeof(pthread_cond_t));
if (condp == NULL) {
return FALSE;
}
pthread_cond_init(condp, NULL);
return Yap_unify(ARG1, MkIntegerTerm((Int)condp));
}
typedef struct {
UInt indx;
mbox_t mbox;
} counted_mbox;
static Int
p_mbox_create( USES_REGS1 )
{
Term namet = Deref(ARG1);
mbox_t* mboxp = GLOBAL_named_mboxes;
if (IsVarTerm(namet)) {
AtomEntry *ae;
int new;
mbox_t mbox;
ae = Yap_lookupBlob(&mbox, sizeof(mbox), &PL_Message_Queue, &new);
namet = MkAtomTerm(RepAtom(ae));
mboxp = (mbox_t *)(ae->rep.blob[0].data);
Yap_unify(ARG1, namet);
LOCK(GLOBAL_mboxq_lock);
} else if (IsAtomTerm(namet)) {
LOCK(GLOBAL_mboxq_lock);
while( mboxp && mboxp->name != namet)
mboxp = mboxp->next;
if (mboxp) {
UNLOCK(GLOBAL_mboxq_lock);
return FALSE;
}
mboxp = (mbox_t *)Yap_AllocCodeSpace(sizeof(mbox_t));
if (mboxp == NULL) {
UNLOCK(GLOBAL_mboxq_lock);
return FALSE;
}
// global mbox, for now we'll just insert in list
mboxp->next = GLOBAL_named_mboxes;
GLOBAL_named_mboxes = mboxp;
}
bool rc = mboxCreate( namet, mboxp PASS_REGS );
UNLOCK(GLOBAL_mboxq_lock);
return rc;
}
static Int
p_mbox_destroy( USES_REGS1 )
{
Term namet = Deref(ARG1);
mbox_t* mboxp = GLOBAL_named_mboxes, *prevp;
if (IsVarTerm(namet) )
return FALSE;
if (IsIntTerm(namet) ) {
return FALSE;
}
LOCK(GLOBAL_mboxq_lock);
prevp = NULL;
while( mboxp && mboxp->name != namet) {
prevp = mboxp;
mboxp = mboxp->next;
}
if (!mboxp) {
UNLOCK(GLOBAL_mboxq_lock);
return FALSE;
}
if (mboxp == GLOBAL_named_mboxes) {
GLOBAL_named_mboxes = mboxp->next;
} else {
prevp->next = mboxp->next;
}
UNLOCK(GLOBAL_mboxq_lock);
mboxDestroy(mboxp PASS_REGS);
Yap_FreeCodeSpace( (char *)mboxp );
return TRUE;
}
static mbox_t*
getMbox(Term t)
{
mbox_t* mboxp;
if (IsAtomTerm(t=Deref(t))) {
Atom at = AtomOfTerm(t);
LOCK(GLOBAL_mboxq_lock);
if (IsBlob(at)) {
mboxp = (mbox_t *)(RepAtom(at)->rep.blob[0].data);
} else {
mboxp = GLOBAL_named_mboxes;
while( mboxp && mboxp->name != t) {
mboxp = mboxp->next;
}
}
if (!mboxp->open)
mboxp = NULL;
if (mboxp) {
pthread_mutex_lock(& mboxp->mutex);
}
UNLOCK(GLOBAL_mboxq_lock);
} else if (IsIntTerm(t)) {
int wid = IntOfTerm(t);
if (REMOTE(wid) &&
(REMOTE_ThreadHandle(wid).in_use || REMOTE_ThreadHandle(wid).zombie))
{
return &REMOTE_ThreadHandle(wid).mbox_handle;
} else {
return NULL;
}
if (!mboxp->open)
mboxp = NULL;
if (mboxp) {
pthread_mutex_lock(& mboxp->mutex);
}
} else {
return NULL;
}
return mboxp;
}
static Int
p_mbox_send( USES_REGS1 )
{
Term namet = Deref(ARG1);
mbox_t* mboxp = getMbox(namet) ;
if (!mboxp)
return FALSE;
return mboxSend(mboxp, Deref(ARG2) PASS_REGS);
}
static Int
p_mbox_size( USES_REGS1 )
{
Term namet = Deref(ARG1);
mbox_t* mboxp = getMbox(namet) ;
if (!mboxp)
return FALSE;
return Yap_unify( ARG2, MkIntTerm(mboxp->nmsgs));
}
static Int
p_mbox_receive( USES_REGS1 )
{
Term namet = Deref(ARG1);
mbox_t* mboxp = getMbox(namet) ;
if (!mboxp)
return FALSE;
return mboxReceive(mboxp, Deref(ARG2) PASS_REGS);
}
static Int
p_mbox_peek( USES_REGS1 )
{
Term namet = Deref(ARG1);
mbox_t* mboxp = getMbox(namet) ;
if (!mboxp)
return FALSE;
return mboxPeek(mboxp, Deref(ARG2) PASS_REGS);
}
static Int
p_cond_destroy( USES_REGS1 )
{
pthread_cond_t *condp = (pthread_cond_t *)IntegerOfTerm(Deref(ARG1));
if (pthread_cond_destroy(condp) < 0)
return FALSE;
Yap_FreeCodeSpace((void *)condp);
return TRUE;
}
static Int
p_cond_signal( USES_REGS1 )
{
pthread_cond_t *condp = (pthread_cond_t *)IntegerOfTerm(Deref(ARG1));
if (pthread_cond_signal(condp) < 0)
return FALSE;
return TRUE;
}
static Int
p_cond_broadcast( USES_REGS1 )
{
pthread_cond_t *condp = (pthread_cond_t *)IntegerOfTerm(Deref(ARG1));
if (pthread_cond_broadcast(condp) < 0)
return FALSE;
v return TRUE;
}
static Int
p_cond_wait( USES_REGS1 )
{
pthread_cond_t *condp = (pthread_cond_t *)IntegerOfTerm(Deref(ARG1));
SWIMutex *mut = (SWIMutex*)IntegerOfTerm(Deref(ARG2));
pthread_cond_wait(condp, &mut->m);
return TRUE;
}
static Int
p_thread_stacks( USES_REGS1 )
{ /* '$thread_signal'(+P) */
Int tid = IntegerOfTerm(Deref(ARG1));
Int status= TRUE;
MUTEX_LOCK(&(REMOTE_ThreadHandle(tid).tlock));
if (REMOTE(tid) &&
(REMOTE_ThreadHandle(tid).in_use || REMOTE_ThreadHandle(tid).zombie)) {
status &= Yap_unify(ARG2,MkIntegerTerm(REMOTE_ThreadHandle(tid).ssize));
status &= Yap_unify(ARG3,MkIntegerTerm(REMOTE_ThreadHandle(tid).tsize));
status &= Yap_unify(ARG4,MkIntegerTerm(REMOTE_ThreadHandle(tid).sysize));
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return status;
}
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(tid).tlock));
return FALSE;
}
static Int
p_thread_atexit( USES_REGS1 )
{ /* '$thread_signal'(+P) */
Term t;
if (LOCAL_ThreadHandle.texit == NULL ||
LOCAL_ThreadHandle.texit->Entry == MkAtomTerm(AtomTrue)) {
return FALSE;
}
do {
t = Yap_PopTermFromDB(LOCAL_ThreadHandle.texit);
if (t == 0) {
if (LOCAL_Error_TYPE == OUT_OF_ATTVARS_ERROR) {
LOCAL_Error_TYPE = YAP_NO_ERROR;
if (!Yap_growglobal(NULL)) {
Yap_Error(OUT_OF_ATTVARS_ERROR, TermNil, LOCAL_ErrorMessage);
thread_die(worker_id, FALSE);
return FALSE;
}
} else {
LOCAL_Error_TYPE = YAP_NO_ERROR;
if (!Yap_growstack(LOCAL_ThreadHandle.tgoal->NOfCells*CellSize)) {
Yap_Error(OUT_OF_STACK_ERROR, TermNil, LOCAL_ErrorMessage);
thread_die(worker_id, FALSE);
return FALSE;
}
}
}
} while (t == 0);
LOCAL_ThreadHandle.texit = NULL;
return Yap_unify(ARG1, t) && Yap_unify(ARG2, LOCAL_ThreadHandle.texit_mod);
}
static Int
p_thread_signal( USES_REGS1 )
{ /* '$thread_signal'(+P) */
Int wid = IntegerOfTerm(Deref(ARG1));
/* make sure the lock is available */
MUTEX_LOCK(&(REMOTE_ThreadHandle(wid).tlock));
if (!REMOTE_ThreadHandle(wid).in_use ||
!REMOTE_ThreadHandle(wid).current_yaam_regs) {
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return TRUE;
}
Yap_external_signal( wid, YAP_ITI_SIGNAL );
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return TRUE;
}
static Int
p_no_threads( USES_REGS1 )
{ /* '$thread_signal'(+P) */
return FALSE;
}
static Int
p_nof_threads( USES_REGS1 )
{ /* '$nof_threads'(+P) */
int i = 0, wid;
LOCK(GLOBAL_ThreadHandlesLock);
for (wid = 0; wid < MAX_THREADS; wid++) {
if (!Yap_local[wid]) break;
if (REMOTE_ThreadHandle(wid).in_use)
i++;
}
UNLOCK(GLOBAL_ThreadHandlesLock);
return Yap_unify(ARG1,MkIntegerTerm(i));
}
static Int
p_max_workers( USES_REGS1 )
{ /* '$max_workers'(+P) */
return Yap_unify(ARG1,MkIntegerTerm(MAX_WORKERS));
}
static Int
p_max_threads( USES_REGS1 )
{ /* '$max_threads'(+P) */
return Yap_unify(ARG1,MkIntegerTerm(MAX_THREADS));
}
static Int
p_nof_threads_created( USES_REGS1 )
{ /* '$nof_threads'(+P) */
return Yap_unify(ARG1,MkIntTerm(GLOBAL_NOfThreadsCreated));
}
static Int
p_thread_runtime( USES_REGS1 )
{ /* '$thread_runtime'(+P) */
return Yap_unify(ARG1,MkIntegerTerm(GLOBAL_ThreadsTotalTime));
}
static Int
p_thread_self_lock( USES_REGS1 )
{ /* '$thread_unlock' */
MUTEX_LOCK(&(LOCAL_ThreadHandle.tlock));
return Yap_unify(ARG1,MkIntegerTerm(worker_id));
}
static Int
p_thread_unlock( USES_REGS1 )
{ /* '$thread_unlock' */
Int wid = IntegerOfTerm(Deref(ARG1));
MUTEX_UNLOCK(&(REMOTE_ThreadHandle(wid).tlock));
return TRUE;
}
intptr_t
system_thread_id(PL_thread_info_t *info)
{ if ( !info )
{ CACHE_REGS
if ( LOCAL )
info = SWI_thread_info(worker_id, NULL);
else
return -1;
}
#ifdef __linux__
return info->pid;
#else
#ifdef __WINDOWS__
return info->w32id;
#else
return (intptr_t)info->tid;
#endif
#endif
}
void
Yap_InitFirstWorkerThreadHandle(void)
{
CACHE_REGS
set_system_thread_id(0, NULL);
LOCAL_ThreadHandle.id = 0;
LOCAL_ThreadHandle.in_use = TRUE;
LOCAL_ThreadHandle.default_yaam_regs =
&Yap_standard_regs;
LOCAL_ThreadHandle.current_yaam_regs =
&Yap_standard_regs;
LOCAL_PL_local_data_p->reg_cache =
&Yap_standard_regs;
LOCAL_ThreadHandle.pthread_handle = pthread_self();
pthread_mutex_init(&REMOTE_ThreadHandle(0).tlock, NULL);
pthread_mutex_init(&REMOTE_ThreadHandle(0).tlock_status, NULL);
LOCAL_ThreadHandle.tdetach = MkAtomTerm(AtomFalse);
LOCAL_ThreadHandle.ref_count = 1;
}
FILE *debugf;
void Yap_InitThreadPreds(void)
{
Yap_InitCPred("$no_threads", 0, p_no_threads, 0);
Yap_InitCPred("$max_workers", 1, p_max_workers, 0);
Yap_InitCPred("$max_threads", 1, p_max_threads, 0);
Yap_InitCPred("$thread_new_tid", 1, p_thread_new_tid, 0);
Yap_InitCPred("$create_thread", 7, p_create_thread, 0);
Yap_InitCPred("$thread_self", 1, p_thread_self, SafePredFlag);
Yap_InitCPred("$thread_status_lock", 1, p_thread_status_lock, SafePredFlag);
Yap_InitCPred("$thread_status_unlock", 1, p_thread_status_unlock, SafePredFlag);
Yap_InitCPred("$thread_zombie_self", 1, p_thread_zombie_self, SafePredFlag);
Yap_InitCPred("$thread_join", 1, p_thread_join, 0);
Yap_InitCPred("$thread_destroy", 1, p_thread_destroy, 0);
Yap_InitCPred("thread_yield", 0, p_thread_yield, 0);
/** @pred thread_yield
Voluntarily relinquish the processor.
*/
Yap_InitCPred("$detach_thread", 1, p_thread_detach, 0);
Yap_InitCPred("$thread_detached", 1, p_thread_detached, 0);
Yap_InitCPred("$thread_detached", 2, p_thread_detached2, 0);
Yap_InitCPred("$thread_exit", 0, p_thread_exit, 0);
Yap_InitCPred("thread_setconcurrency", 2, p_thread_set_concurrency, 0);
/** @pred thread_setconcurrency(+ _Old_, - _New_)
Determine the concurrency of the process, which is defined as the
maximum number of concurrently active threads. `Active` here means
they are using CPU time. This option is provided if the
thread-implementation provides
`pthread_setconcurrency()`. Solaris is a typical example of this
family. On other systems this predicate unifies _Old_ to 0 (zero)
and succeeds silently.
*/
Yap_InitCPred("$valid_thread", 1, p_valid_thread, 0);
Yap_InitCPred("$new_mutex", 1, p_new_mutex, SafePredFlag);
Yap_InitCPred("$destroy_mutex", 1, p_destroy_mutex, SafePredFlag);
Yap_InitCPred("$lock_mutex", 1, p_lock_mutex, SafePredFlag);
Yap_InitCPred("$trylock_mutex", 1, p_trylock_mutex, SafePredFlag);
Yap_InitCPred("$unlock_mutex", 1, p_unlock_mutex, SafePredFlag);
Yap_InitCPred("$with_mutex", 2, p_with_mutex, MetaPredFlag);
Yap_InitCPred("$with_with_mutex", 1, p_with_with_mutex, 0);
Yap_InitCPred("$unlock_with_mutex", 1, p_unlock_with_mutex, 0);
Yap_InitCPred("$mutex_info", 3, p_mutex_info, SafePredFlag);
Yap_InitCPred("$cond_create", 1, p_cond_create, SafePredFlag);
Yap_InitCPred("$cond_destroy", 1, p_cond_destroy, SafePredFlag);
Yap_InitCPred("$cond_signal", 1, p_cond_signal, SafePredFlag);
Yap_InitCPred("$cond_broadcast", 1, p_cond_broadcast, SafePredFlag);
Yap_InitCPred("$cond_wait", 2, p_cond_wait, SafePredFlag);
Yap_InitCPred("$message_queue_create", 1, p_mbox_create, SafePredFlag);
Yap_InitCPred("$message_queue_destroy", 1, p_mbox_destroy, SafePredFlag);
Yap_InitCPred("$message_queue_send", 2, p_mbox_send, SafePredFlag);
Yap_InitCPred("$message_queue_receive", 2, p_mbox_receive, SafePredFlag);
Yap_InitCPred("$message_queue_size", 2, p_mbox_size, SafePredFlag);
Yap_InitCPred("$message_queue_peek", 2, p_mbox_peek, SafePredFlag);
Yap_InitCPred("$thread_stacks", 4, p_thread_stacks, SafePredFlag);
Yap_InitCPred("$signal_thread", 1, p_thread_signal, SafePredFlag);
Yap_InitCPred("$nof_threads", 1, p_nof_threads, SafePredFlag);
Yap_InitCPred("$nof_threads_created", 1, p_nof_threads_created, SafePredFlag);
Yap_InitCPred("$thread_sleep", 4, p_thread_sleep, SafePredFlag);
Yap_InitCPred("$thread_runtime", 1, p_thread_runtime, SafePredFlag);
Yap_InitCPred("$thread_self_lock", 1, p_thread_self_lock, SafePredFlag);
Yap_InitCPred("$thread_run_at_exit", 2, p_thread_atexit, SafePredFlag);
Yap_InitCPred("$thread_unlock", 1, p_thread_unlock, SafePredFlag);
#if DEBUG_LOCKS||DEBUG_PE_LOCKS
Yap_InitCPred("debug_locks", 0, p_debug_locks, SafePredFlag);
Yap_InitCPred("nodebug_locks", 0, p_nodebug_locks, SafePredFlag);
#endif
}
#else
int
Yap_NOfThreads(void) {
// GLOBAL_ThreadHandlesLock is held
#ifdef YAPOR
return 2;
#else
return 1;
#endif
}
static Int
p_no_threads(void)
{ /* '$thread_signal'(+P) */
return TRUE;
}
static Int
p_nof_threads(void)
{ /* '$nof_threads'(+P) */
return Yap_unify(ARG1,MkIntTerm(1));
}
static Int
p_max_threads(void)
{ /* '$nof_threads'(+P) */
return Yap_unify(ARG1,MkIntTerm(1));
}
static Int
p_nof_threads_created(void)
{ /* '$nof_threads'(+P) */
return Yap_unify(ARG1,MkIntTerm(1));
}
static Int
p_thread_runtime(void)
{ /* '$thread_runtime'(+P) */
return Yap_unify(ARG1,MkIntTerm(0));
}
static Int
p_thread_self(void)
{ /* '$thread_runtime'(+P) */
return Yap_unify(ARG1,MkIntTerm(0));
}
static Int
p_thread_stacks(void)
{ /* '$thread_runtime'(+P) */
return FALSE;
}
static Int
p_thread_unlock(void)
{ /* '$thread_runtime'(+P) */
return TRUE;
}
static Int
p_max_workers(void)
{ /* '$max_workers'(+P) */
return Yap_unify(ARG1,MkIntTerm(1));
}
static Int
p_new_mutex(void)
{ /* '$max_workers'(+P) */
static int mutexes = 1;
return Yap_unify(ARG1, MkIntegerTerm(mutexes++) );
}
static Int
p_with_mutex( USES_REGS1 )
{
Int mut;
Term t1 = Deref(ARG1), excep;
Int rc = FALSE;
Int creeping = Yap_get_signal(YAP_CREEP_SIGNAL);
PredEntry *pe;
Term tm = CurrentModule;
Term tg = Deref(ARG2);
if (IsVarTerm(t1)) {
p_new_mutex( PASS_REGS1 );
t1 = Deref(ARG1);
mut = IntOfTerm(t1);
}
tg = Yap_StripModule(tg, &tm);
if (IsVarTerm(tg)) {
Yap_Error(INSTANTIATION_ERROR, ARG2, "with_mutex/2");
goto end;
} else if (IsApplTerm(tg)) {
register Functor f = FunctorOfTerm(tg);
register CELL *pt;
size_t i, arity;
f = FunctorOfTerm(tg);
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, tg, "with_mutex/2");
goto end;
}
arity = ArityOfFunctor(f);
if (arity > MaxTemps) {
Yap_Error(TYPE_ERROR_CALLABLE, tg, "with_mutex/2");
goto end;
}
pe = RepPredProp(PredPropByFunc(f, tm));
pt = RepAppl(tg)+1;
for (i= 0; i < arity; i++ )
XREGS[i+1] = pt[i];
} else if (IsAtomTerm(tg)) {
pe = RepPredProp(PredPropByAtom(AtomOfTerm(tg), tm));
} else if (IsPairTerm(tg)) {
register CELL *pt;
Functor f;
f = FunctorDot;
pe = RepPredProp(PredPropByFunc(f, tm));
pt = RepPair(tg);
XREGS[1] = pt[0];
XREGS[2] = pt[1];
} else {
Yap_Error(TYPE_ERROR_CALLABLE, tg, "with_mutex/2");
goto end;
}
if (
pe->OpcodeOfPred != FAIL_OPCODE &&
Yap_execute_pred(pe, NULL PASS_REGS) ) {
rc = TRUE;
}
end:
ARG1 = MkIntegerTerm(mut);
excep = Yap_GetException();
if (creeping) {
Yap_signal( YAP_CREEP_SIGNAL );
} else if ( excep != 0) {
return Yap_JumpToEnv(excep);
}
return rc;
}
void
Yap_InitFirstWorkerThreadHandle(void)
{
}
void Yap_InitThreadPreds(void)
{
Yap_InitCPred("$with_mutex", 2, p_with_mutex, MetaPredFlag);
Yap_InitCPred("$new_mutex", 1, p_new_mutex, SafePredFlag);
Yap_InitCPred("$max_workers", 1, p_max_workers, 0);
Yap_InitCPred("$thread_self", 1, p_thread_self, SafePredFlag);
Yap_InitCPred("$no_threads", 0, p_no_threads, SafePredFlag);
Yap_InitCPred("$max_threads", 1, p_max_threads, SafePredFlag);
Yap_InitCPred("$nof_threads", 1, p_nof_threads, SafePredFlag);
Yap_InitCPred("$nof_threads_created", 1, p_nof_threads_created, SafePredFlag);
Yap_InitCPred("$thread_stacks", 4, p_thread_stacks, SafePredFlag);
Yap_InitCPred("$thread_runtime", 1, p_thread_runtime, SafePredFlag);
Yap_InitCPred("$thread_unlock", 1, p_thread_unlock, SafePredFlag);
#if DEBUG_LOCKS||DEBUG_PE_LOCKS
Yap_InitCPred("debug_locks", 0, p_debug_locks, SafePredFlag);
Yap_InitCPred("nodebug_locks", 0, p_nodebug_locks, SafePredFlag);
#endif
}
#endif /* THREADS */
/**
@}
*/
Reference in New Issue View Git Blame Copy Permalink