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yap-6.3/OPTYap/opt.misc.c

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/* ------------------ **
** Includes **
** ------------------ */
#include "Yap.h"
#if defined(YAPOR) || defined(TABLING)
#include <stdarg.h>
#include <stdio.h>
#include "Yatom.h"
#include "yapio.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_STDARG_H
#include <stdarg.h>
#endif
/* ------------------------------------------- **
** Global variables are defined here **
** ------------------------------------------- */
struct global_data *GLOBAL;
struct local_data *LOCAL;
#ifdef YAPOR
struct local_data *REMOTE[MAX_WORKERS];
struct worker WORKER;
#endif /* YAPOR */
/* -------------------------- **
** Global functions **
** -------------------------- */
void abort_optyap(const char *msg, ...) {
va_list args;
va_start(args, msg);
fprintf(stderr, "[ ");
#ifdef YAPOR
fprintf (stderr, "Worker %d ", worker_id);
#endif /* YAPOR */
fprintf (stderr, "Aborting OPTYap -> ");
vfprintf(stderr, msg, args);
fprintf(stderr, " ]\n");
#ifdef YAPOR
unmap_memory();
#endif
exit (1);
}
void itos(int i, char *s) {
int n,r,j;
n = 10;
while (n <= i) n *= 10;
j = 0;
while (n > 1) {
n = n / 10;
r = i / n;
i = i - r * n;
s[j++] = r + '0';
}
s[j] = 0;
return;
}
void information_message(const char *mesg,...) {
va_list args;
va_start(args, mesg);
fprintf(stdout, "[ ");
vfprintf(stdout, mesg, args);
fprintf(stdout, " ]\n");
return;
}
/* ------------------------- **
** Local functions **
** ------------------------- */
int tabling_putchar(int sno, int ch) {
return(YP_putc(ch, stderr));
}
#endif /* TABLING_DEBUG */
#ifdef YAPOR
#if defined(YAPOR_ERRORS) || defined(TABLING_ERRORS)
void error_message(const char *mesg, ...) {
va_list args;
va_start(args, mesg);
#ifdef YAPOR
LOCK(GLOBAL_LOCKS_stderr_messages);
#endif /* YAPOR */
fprintf(stderr, "[ ");
#ifdef YAPOR
fprintf(stderr, "W%d: ", worker_id);
#endif /* YAPOR */
fprintf(stderr, "Potencial Error -> ");
vfprintf(stderr, mesg, args);
fprintf(stderr, " ]\n");
#ifdef YAPOR
UNLOCK(GLOBAL_LOCKS_stderr_messages);
#endif /* YAPOR */
return;
}
#endif /* YAPOR_ERRORS || TABLING_ERRORS */
#ifdef YAPOR
#ifdef sparc
void rw_lock_voodoo(void) {
/* code taken from the Linux kernel, it handles shifting between locks */
/* Read/writer locks, as usual this is overly clever to make it as fast as possible. */
/* caches... */
__asm__ __volatile__(
"___rw_read_enter_spin_on_wlock:"
" orcc %g2, 0x0, %g0"
" be,a ___rw_read_enter"
" ldstub [%g1 + 3], %g2"
" b ___rw_read_enter_spin_on_wlock"
" ldub [%g1 + 3], %g2"
"___rw_read_exit_spin_on_wlock:"
" orcc %g2, 0x0, %g0"
" be,a ___rw_read_exit"
" ldstub [%g1 + 3], %g2"
" b ___rw_read_exit_spin_on_wlock"
" ldub [%g1 + 3], %g2"
"___rw_write_enter_spin_on_wlock:"
" orcc %g2, 0x0, %g0"
" be,a ___rw_write_enter"
" ldstub [%g1 + 3], %g2"
" b ___rw_write_enter_spin_on_wlock"
" ld [%g1], %g2"
""
" .globl ___rw_read_enter"
"___rw_read_enter:"
" orcc %g2, 0x0, %g0"
" bne,a ___rw_read_enter_spin_on_wlock"
" ldub [%g1 + 3], %g2"
" ld [%g1], %g2"
" add %g2, 1, %g2"
" st %g2, [%g1]"
" retl"
" mov %g4, %o7"
" .globl ___rw_read_exit"
"___rw_read_exit:"
" orcc %g2, 0x0, %g0"
" bne,a ___rw_read_exit_spin_on_wlock"
" ldub [%g1 + 3], %g2"
" ld [%g1], %g2"
" sub %g2, 0x1ff, %g2"
" st %g2, [%g1]"
" retl"
" mov %g4, %o7"
" .globl ___rw_write_enter"
"___rw_write_enter:"
" orcc %g2, 0x0, %g0"
" bne ___rw_write_enter_spin_on_wlock"
" ld [%g1], %g2"
" andncc %g2, 0xff, %g0"
" bne,a ___rw_write_enter_spin_on_wlock"
" stb %g0, [%g1 + 3]"
" retl"
" mov %g4, %o7"
);
}
#endif /* sparc */
#ifdef i386
asm(
".align 4"
".globl __write_lock_failed"
"__write_lock_failed:"
" lock; addl $" RW_LOCK_BIAS_STR ",(%eax)"
"1: cmpl $" RW_LOCK_BIAS_STR ",(%eax)"
" jne 1b"
""
" lock; subl $" RW_LOCK_BIAS_STR ",(%eax)"
" jnz __write_lock_failed"
" ret"
""
""
".align 4"
".globl __read_lock_failed"
"__read_lock_failed:"
" lock ; incl (%eax)"
"1: cmpl $1,(%eax)"
" js 1b"
""
" lock ; decl (%eax)"
" js __read_lock_failed"
" ret"
);
#endif /* i386 */
#endif /* YAPOR */
#endif /* YAPOR || TABLING */