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yap-6.3/OPTYap/opt.init.c
ricroc ddcd80d2a9 *** empty log message *** 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@2215 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2008-04-11 16:30:28 +00:00

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/**********************************************************************
The OPTYap Prolog system
OPTYap extends the Yap Prolog system to support or-parallel tabling
Copyright: R. Rocha and NCC - University of Porto, Portugal
File: opt.init.c
version: $Id: opt.init.c,v 1.16 2008-04-11 16:26:18 ricroc Exp $
**********************************************************************/
/* ------------------ **
** Includes **
** ------------------ */
#include "Yap.h"
#if defined(YAPOR) || defined(TABLING)
#define OPT_MAVAR_STATIC
#include "Yatom.h"
#include "Heap.h"
#include <unistd.h>
#include <signal.h>
#ifdef YAPOR
#include "or.macros.h"
#endif /* YAPOR */
#ifdef TABLING
#include "tab.macros.h"
#endif /* TABLING */
#if defined(TABLING) || !defined(ACOW)
#ifndef TABLING
#include "opt.mavar.h"
#endif /* !TABLING */
#ifdef MULTI_ASSIGNMENT_VARIABLES
ma_hash_entry Yap_ma_hash_table[MAVARS_HASH_SIZE];
UInt Yap_timestamp; /* an unsigned int */
ma_h_inner_struct *Yap_ma_h_top;
#endif /* MULTI_ASSIGNMENT_VARIABLES */
#endif /* TABLING || !ACOW */
#ifdef ACOW
#include "sys/wait.h"
#endif /* ACOW */
/* ---------------------- **
** Local macros **
** ---------------------- */
#define STRUCTS_PER_PAGE(STR_TYPE) ((Yap_page_size - STRUCT_SIZE(struct page_header)) / STRUCT_SIZE(STR_TYPE))
#define INIT_PAGES(PG, STR_TYPE) \
INIT_LOCK(Pg_lock(PG)); \
Pg_pg_alloc(PG) = 0; \
Pg_str_in_use(PG) = 0; \
Pg_str_per_pg(PG) = STRUCTS_PER_PAGE(STR_TYPE); \
Pg_free_pg(PG) = NULL
/* -------------------------- **
** Global functions **
** -------------------------- */
void Yap_init_global(int max_table_size, int n_workers, int sch_loop, int delay_load) {
int i;
/* global data related to memory management */
#ifdef LIMIT_TABLING
if (max_table_size)
GLOBAL_MAX_PAGES = ((max_table_size - 1) * 1024 * 1024 / SHMMAX + 1) * SHMMAX / Yap_page_size;
else
GLOBAL_MAX_PAGES = -1;
#endif /* LIMIT_TABLING */
INIT_PAGES(GLOBAL_PAGES_void, void *);
#ifdef YAPOR
INIT_PAGES(GLOBAL_PAGES_or_fr, struct or_frame);
INIT_PAGES(GLOBAL_PAGES_qg_sol_fr, struct query_goal_solution_frame);
INIT_PAGES(GLOBAL_PAGES_qg_ans_fr, struct query_goal_answer_frame);
#endif /* YAPOR */
#ifdef TABLING_INNER_CUTS
INIT_PAGES(GLOBAL_PAGES_tg_sol_fr, struct table_subgoal_solution_frame);
INIT_PAGES(GLOBAL_PAGES_tg_ans_fr, struct table_subgoal_answer_frame);
#endif /* TABLING_INNER_CUTS */
#ifdef TABLING
INIT_PAGES(GLOBAL_PAGES_tab_ent, struct table_entry);
INIT_PAGES(GLOBAL_PAGES_sg_fr, struct subgoal_frame);
INIT_PAGES(GLOBAL_PAGES_sg_node, struct subgoal_trie_node);
INIT_PAGES(GLOBAL_PAGES_ans_node, struct answer_trie_node);
INIT_PAGES(GLOBAL_PAGES_sg_hash, struct subgoal_hash);
INIT_PAGES(GLOBAL_PAGES_ans_hash, struct answer_hash);
INIT_PAGES(GLOBAL_PAGES_dep_fr, struct dependency_frame);
#endif /* TABLING */
#if defined(YAPOR) && defined(TABLING)
INIT_PAGES(GLOBAL_PAGES_susp_fr, struct suspension_frame);
#endif /* YAPOR && TABLING */
#ifdef YAPOR
/* global static data */
number_workers = n_workers;
worker_pid(0) = getpid();
for (i = 1; i < number_workers; i++) worker_pid(i) = 0;
SCHEDULER_LOOP = sch_loop;
DELAYED_RELEASE_LOAD = delay_load;
/* global data related to or-performance */
GLOBAL_number_goals = 0;
GLOBAL_best_times(0) = 0;
GLOBAL_performance_mode = PERFORMANCE_OFF;
/* global data related to or-parallelism */
BITMAP_clear(GLOBAL_bm_present_workers);
for (i = 0; i < number_workers; i++)
BITMAP_insert(GLOBAL_bm_present_workers, i);
BITMAP_copy(GLOBAL_bm_idle_workers, GLOBAL_bm_present_workers);
BITMAP_clear(GLOBAL_bm_root_cp_workers);
BITMAP_clear(GLOBAL_bm_invisible_workers);
BITMAP_clear(GLOBAL_bm_requestable_workers);
BITMAP_clear(GLOBAL_bm_executing_workers);
BITMAP_copy(GLOBAL_bm_finished_workers, GLOBAL_bm_present_workers);
INIT_LOCK(GLOBAL_LOCKS_bm_idle_workers);
INIT_LOCK(GLOBAL_LOCKS_bm_root_cp_workers);
INIT_LOCK(GLOBAL_LOCKS_bm_invisible_workers);
INIT_LOCK(GLOBAL_LOCKS_bm_requestable_workers);
INIT_LOCK(GLOBAL_LOCKS_bm_executing_workers);
INIT_LOCK(GLOBAL_LOCKS_bm_finished_workers);
#ifdef TABLING_INNER_CUTS
INIT_LOCK(GLOBAL_LOCKS_bm_pruning_workers);
#endif /* TABLING_INNER_CUTS */
GLOBAL_LOCKS_who_locked_heap = MAX_WORKERS;
INIT_LOCK(GLOBAL_LOCKS_heap_access);
INIT_LOCK(GLOBAL_LOCKS_alloc_block);
#if defined(YAPOR_ERRORS) || defined(TABLING_ERRORS)
INIT_LOCK(GLOBAL_LOCKS_stderr_messages);
#endif /* YAPOR_ERRORS || TABLING_ERRORS */
if (number_workers == 1)
PARALLEL_EXECUTION_MODE = FALSE;
else
PARALLEL_EXECUTION_MODE = TRUE;
#endif /* YAPOR */
#ifdef TABLING
/* global data related to tabling */
GLOBAL_root_tab_ent = NULL;
#ifdef LIMIT_TABLING
GLOBAL_first_sg_fr = NULL;
GLOBAL_last_sg_fr = NULL;
GLOBAL_check_sg_fr = NULL;
#endif /* LIMIT_TABLING */
GLOBAL_root_dep_fr = NULL;
for (i = 0; i < MAX_TABLE_VARS; i++) {
CELL *pt = GLOBAL_table_var_enumerator_addr(i);
RESET_VARIABLE(pt);
}
#ifdef TABLE_LOCK_AT_WRITE_LEVEL
for (i = 0; i < TABLE_LOCK_BUCKETS; i++)
INIT_LOCK(GLOBAL_table_lock(i));
#endif /* TABLE_LOCK_AT_WRITE_LEVEL */
#endif /* TABLING */
return;
}
void init_local(void) {
#ifdef YAPOR
/* local data related to or-parallelism */
LOCAL = REMOTE + worker_id;
LOCAL_top_cp = B_BASE;
LOCAL_top_or_fr = GLOBAL_root_or_fr;
LOCAL_load = 0;
LOCAL_share_request = MAX_WORKERS;
LOCAL_reply_signal = ready;
#ifdef ENV_COPY
INIT_LOCK(LOCAL_lock_signals);
#endif /* ENV_COPY */
LOCAL_prune_request = NULL;
#endif /* YAPOR */
INIT_LOCK(LOCAL_lock);
#ifdef TABLING
/* local data related to tabling */
LOCAL_next_free_ans_node = NULL;
LOCAL_top_sg_fr = NULL;
LOCAL_top_dep_fr = GLOBAL_root_dep_fr;
#ifdef YAPOR
LOCAL_top_cp_on_stack = B_BASE; /* ??? */
LOCAL_top_susp_or_fr = GLOBAL_root_or_fr;
#endif /* YAPOR */
#endif /* TABLING */
return;
}
void make_root_frames(void) {
#ifdef YAPOR
/* root or frame */
or_fr_ptr or_fr;
ALLOC_OR_FRAME(or_fr);
INIT_LOCK(OrFr_lock(or_fr));
OrFr_alternative(or_fr) = NULL;
BITMAP_copy(OrFr_members(or_fr), GLOBAL_bm_present_workers);
OrFr_node(or_fr) = B_BASE;
OrFr_nearest_livenode(or_fr) = NULL;
OrFr_depth(or_fr) = 0;
OrFr_pend_prune_cp(or_fr) = NULL;
OrFr_nearest_leftnode(or_fr) = or_fr;
OrFr_qg_solutions(or_fr) = NULL;
#ifdef TABLING_INNER_CUTS
OrFr_tg_solutions(or_fr) = NULL;
#endif /* TABLING_INNER_CUTS */
#ifdef TABLING
OrFr_owners(or_fr) = number_workers;
OrFr_next_on_stack(or_fr) = NULL;
OrFr_suspensions(or_fr) = NULL;
OrFr_nearest_suspnode(or_fr) = or_fr;
#endif /* TABLING */
OrFr_next(or_fr) = NULL;
GLOBAL_root_or_fr = or_fr;
#endif /* YAPOR */
#ifdef TABLING
/* root dependency frame */
if (!GLOBAL_root_dep_fr)
new_dependency_frame(GLOBAL_root_dep_fr, FALSE, NULL, NULL, NULL, NULL, NULL);
#endif /* TABLING */
}
#ifdef YAPOR
void init_workers(void) {
int proc;
NOfThreads = number_workers;
#ifdef ACOW
if (number_workers > 1) {
int son;
son = fork();
if (son == -1)
Yap_Error(FATAL_ERROR, TermNil, "fork error (init_workers)");
if (son > 0) {
/* I am the father, I must stay here and wait for my children to all die */
struct sigaction sigact;
GLOBAL_master_worker = getpid();
sigact.sa_handler = SIG_DFL;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = SA_RESTART;
sigaction(SIGINT, &sigact, NULL);
pause();
exit(0);
} else worker_pid(0) = getpid();
}
#endif /* ACOW */
for (proc = 1; proc < number_workers; proc++) {
int son;
son = fork();
if (son == -1)
Yap_Error(FATAL_ERROR, TermNil, "fork error (init_workers)");
if (son == 0) {
/* new worker */
worker_id = proc;
remap_memory();
break;
}
else worker_pid(proc) = son;
}
}
#endif /* YAPOR */
#endif /* YAPOR || TABLING */
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