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Diffstat (limited to 'gcc-4.4.3/libgomp/env.c')
| -rw-r--r-- | gcc-4.4.3/libgomp/env.c | 656 |
1 files changed, 0 insertions, 656 deletions
diff --git a/gcc-4.4.3/libgomp/env.c b/gcc-4.4.3/libgomp/env.c deleted file mode 100644 index 6809fdfa1..000000000 --- a/gcc-4.4.3/libgomp/env.c +++ /dev/null @@ -1,656 +0,0 @@ -/* Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. - Contributed by Richard Henderson <rth@redhat.com>. - - This file is part of the GNU OpenMP Library (libgomp). - - Libgomp is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3, or (at your option) - any later version. - - Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS - FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - Under Section 7 of GPL version 3, you are granted additional - permissions described in the GCC Runtime Library Exception, version - 3.1, as published by the Free Software Foundation. - - You should have received a copy of the GNU General Public License and - a copy of the GCC Runtime Library Exception along with this program; - see the files COPYING3 and COPYING.RUNTIME respectively. If not, see - <http://www.gnu.org/licenses/>. */ - -/* This file defines the OpenMP internal control variables, and arranges - for them to be initialized from environment variables at startup. */ - -#include "libgomp.h" -#include "libgomp_f.h" -#include <ctype.h> -#include <stdlib.h> -#ifdef STRING_WITH_STRINGS -# include <string.h> -# include <strings.h> -#else -# ifdef HAVE_STRING_H -# include <string.h> -# else -# ifdef HAVE_STRINGS_H -# include <strings.h> -# endif -# endif -#endif -#include <limits.h> -#include <errno.h> -#include <asm/page.h> - -#ifndef HAVE_STRTOULL -# define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base) -#endif - -struct gomp_task_icv gomp_global_icv = { - .nthreads_var = 1, - .run_sched_var = GFS_DYNAMIC, - .run_sched_modifier = 1, - .dyn_var = false, - .nest_var = false -}; - -unsigned short *gomp_cpu_affinity; -size_t gomp_cpu_affinity_len; -unsigned long gomp_max_active_levels_var = INT_MAX; -unsigned long gomp_thread_limit_var = ULONG_MAX; -unsigned long gomp_remaining_threads_count; -#ifndef HAVE_SYNC_BUILTINS -gomp_mutex_t gomp_remaining_threads_lock; -#endif -unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1; -unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var; - -/* Parse the OMP_SCHEDULE environment variable. */ - -static void -parse_schedule (void) -{ - char *env, *end; - unsigned long value; - - env = getenv ("OMP_SCHEDULE"); - if (env == NULL) - return; - - while (isspace ((unsigned char) *env)) - ++env; - if (strncasecmp (env, "static", 6) == 0) - { - gomp_global_icv.run_sched_var = GFS_STATIC; - env += 6; - } - else if (strncasecmp (env, "dynamic", 7) == 0) - { - gomp_global_icv.run_sched_var = GFS_DYNAMIC; - env += 7; - } - else if (strncasecmp (env, "guided", 6) == 0) - { - gomp_global_icv.run_sched_var = GFS_GUIDED; - env += 6; - } - else if (strncasecmp (env, "auto", 4) == 0) - { - gomp_global_icv.run_sched_var = GFS_AUTO; - env += 4; - } - else - goto unknown; - - while (isspace ((unsigned char) *env)) - ++env; - if (*env == '\0') - return; - if (*env++ != ',') - goto unknown; - while (isspace ((unsigned char) *env)) - ++env; - if (*env == '\0') - goto invalid; - - errno = 0; - value = strtoul (env, &end, 10); - if (errno) - goto invalid; - - while (isspace ((unsigned char) *end)) - ++end; - if (*end != '\0') - goto invalid; - - if ((int)value != value) - goto invalid; - - gomp_global_icv.run_sched_modifier = value; - return; - - unknown: - gomp_error ("Unknown value for environment variable OMP_SCHEDULE"); - return; - - invalid: - gomp_error ("Invalid value for chunk size in " - "environment variable OMP_SCHEDULE"); - return; -} - -/* Parse an unsigned long environment variable. Return true if one was - present and it was successfully parsed. */ - -static bool -parse_unsigned_long (const char *name, unsigned long *pvalue) -{ - char *env, *end; - unsigned long value; - - env = getenv (name); - if (env == NULL) - return false; - - while (isspace ((unsigned char) *env)) - ++env; - if (*env == '\0') - goto invalid; - - errno = 0; - value = strtoul (env, &end, 10); - if (errno || (long) value <= 0) - goto invalid; - - while (isspace ((unsigned char) *end)) - ++end; - if (*end != '\0') - goto invalid; - - *pvalue = value; - return true; - - invalid: - gomp_error ("Invalid value for environment variable %s", name); - return false; -} - -/* Parse the OMP_STACKSIZE environment varible. Return true if one was - present and it was successfully parsed. */ - -static bool -parse_stacksize (const char *name, unsigned long *pvalue) -{ - char *env, *end; - unsigned long value, shift = 10; - - env = getenv (name); - if (env == NULL) - return false; - - while (isspace ((unsigned char) *env)) - ++env; - if (*env == '\0') - goto invalid; - - errno = 0; - value = strtoul (env, &end, 10); - if (errno) - goto invalid; - - while (isspace ((unsigned char) *end)) - ++end; - if (*end != '\0') - { - switch (tolower ((unsigned char) *end)) - { - case 'b': - shift = 0; - break; - case 'k': - break; - case 'm': - shift = 20; - break; - case 'g': - shift = 30; - break; - default: - goto invalid; - } - ++end; - while (isspace ((unsigned char) *end)) - ++end; - if (*end != '\0') - goto invalid; - } - - if (((value << shift) >> shift) != value) - goto invalid; - - *pvalue = value << shift; - return true; - - invalid: - gomp_error ("Invalid value for environment variable %s", name); - return false; -} - -/* Parse the GOMP_SPINCOUNT environment varible. Return true if one was - present and it was successfully parsed. */ - -static bool -parse_spincount (const char *name, unsigned long long *pvalue) -{ - char *env, *end; - unsigned long long value, mult = 1; - - env = getenv (name); - if (env == NULL) - return false; - - while (isspace ((unsigned char) *env)) - ++env; - if (*env == '\0') - goto invalid; - - if (strncasecmp (env, "infinite", 8) == 0 - || strncasecmp (env, "infinity", 8) == 0) - { - value = ~0ULL; - end = env + 8; - goto check_tail; - } - - errno = 0; - value = strtoull (env, &end, 10); - if (errno) - goto invalid; - - while (isspace ((unsigned char) *end)) - ++end; - if (*end != '\0') - { - switch (tolower ((unsigned char) *end)) - { - case 'k': - mult = 1000LL; - break; - case 'm': - mult = 1000LL * 1000LL; - break; - case 'g': - mult = 1000LL * 1000LL * 1000LL; - break; - case 't': - mult = 1000LL * 1000LL * 1000LL * 1000LL; - break; - default: - goto invalid; - } - ++end; - check_tail: - while (isspace ((unsigned char) *end)) - ++end; - if (*end != '\0') - goto invalid; - } - - if (value > ~0ULL / mult) - value = ~0ULL; - else - value *= mult; - - *pvalue = value; - return true; - - invalid: - gomp_error ("Invalid value for environment variable %s", name); - return false; -} - -/* Parse a boolean value for environment variable NAME and store the - result in VALUE. */ - -static void -parse_boolean (const char *name, bool *value) -{ - const char *env; - - env = getenv (name); - if (env == NULL) - return; - - while (isspace ((unsigned char) *env)) - ++env; - if (strncasecmp (env, "true", 4) == 0) - { - *value = true; - env += 4; - } - else if (strncasecmp (env, "false", 5) == 0) - { - *value = false; - env += 5; - } - else - env = "X"; - while (isspace ((unsigned char) *env)) - ++env; - if (*env != '\0') - gomp_error ("Invalid value for environment variable %s", name); -} - -/* Parse the OMP_WAIT_POLICY environment variable and store the - result in gomp_active_wait_policy. */ - -static int -parse_wait_policy (void) -{ - const char *env; - int ret = -1; - - env = getenv ("OMP_WAIT_POLICY"); - if (env == NULL) - return -1; - - while (isspace ((unsigned char) *env)) - ++env; - if (strncasecmp (env, "active", 6) == 0) - { - ret = 1; - env += 6; - } - else if (strncasecmp (env, "passive", 7) == 0) - { - ret = 0; - env += 7; - } - else - env = "X"; - while (isspace ((unsigned char) *env)) - ++env; - if (*env == '\0') - return ret; - gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY"); - return -1; -} - -/* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was - present and it was successfully parsed. */ - -static bool -parse_affinity (void) -{ - char *env, *end; - unsigned long cpu_beg, cpu_end, cpu_stride; - unsigned short *cpus = NULL; - size_t allocated = 0, used = 0, needed; - - env = getenv ("GOMP_CPU_AFFINITY"); - if (env == NULL) - return false; - - do - { - while (*env == ' ' || *env == '\t') - env++; - - cpu_beg = strtoul (env, &end, 0); - cpu_end = cpu_beg; - cpu_stride = 1; - if (env == end || cpu_beg >= 65536) - goto invalid; - - env = end; - if (*env == '-') - { - cpu_end = strtoul (++env, &end, 0); - if (env == end || cpu_end >= 65536 || cpu_end < cpu_beg) - goto invalid; - - env = end; - if (*env == ':') - { - cpu_stride = strtoul (++env, &end, 0); - if (env == end || cpu_stride == 0 || cpu_stride >= 65536) - goto invalid; - - env = end; - } - } - - needed = (cpu_end - cpu_beg) / cpu_stride + 1; - if (used + needed >= allocated) - { - unsigned short *new_cpus; - - if (allocated < 64) - allocated = 64; - if (allocated > needed) - allocated <<= 1; - else - allocated += 2 * needed; - new_cpus = realloc (cpus, allocated * sizeof (unsigned short)); - if (new_cpus == NULL) - { - free (cpus); - gomp_error ("not enough memory to store GOMP_CPU_AFFINITY list"); - return false; - } - - cpus = new_cpus; - } - - while (needed--) - { - cpus[used++] = cpu_beg; - cpu_beg += cpu_stride; - } - - while (*env == ' ' || *env == '\t') - env++; - - if (*env == ',') - env++; - else if (*env == '\0') - break; - } - while (1); - - gomp_cpu_affinity = cpus; - gomp_cpu_affinity_len = used; - return true; - - invalid: - gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY"); - return false; -} - -static void __attribute__((constructor)) -initialize_env (void) -{ - unsigned long stacksize; - int wait_policy; - - /* Do a compile time check that mkomp_h.pl did good job. */ - omp_check_defines (); - - parse_schedule (); - parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var); - parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var); - parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var); - parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var); - if (gomp_thread_limit_var != ULONG_MAX) - gomp_remaining_threads_count = gomp_thread_limit_var - 1; -#ifndef HAVE_SYNC_BUILTINS - gomp_mutex_init (&gomp_remaining_threads_lock); -#endif - gomp_init_num_threads (); - gomp_available_cpus = gomp_global_icv.nthreads_var; - if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var)) - gomp_global_icv.nthreads_var = gomp_available_cpus; - if (parse_affinity ()) - gomp_init_affinity (); - wait_policy = parse_wait_policy (); - if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var)) - { - /* Using a rough estimation of 100000 spins per msec, - use 5 min blocking for OMP_WAIT_POLICY=active, - 200 msec blocking when OMP_WAIT_POLICY is not specificed - and 0 when OMP_WAIT_POLICY=passive. - Depending on the CPU speed, this can be e.g. 5 times longer - or 5 times shorter. */ - if (wait_policy > 0) - gomp_spin_count_var = 30000000000LL; - else if (wait_policy < 0) - gomp_spin_count_var = 20000000LL; - } - /* gomp_throttled_spin_count_var is used when there are more libgomp - managed threads than available CPUs. Use very short spinning. */ - if (wait_policy > 0) - gomp_throttled_spin_count_var = 1000LL; - else if (wait_policy < 0) - gomp_throttled_spin_count_var = 100LL; - if (gomp_throttled_spin_count_var > gomp_spin_count_var) - gomp_throttled_spin_count_var = gomp_spin_count_var; - - /* Not strictly environment related, but ordering constructors is tricky. */ - pthread_attr_init (&gomp_thread_attr); - pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED); - - if (parse_stacksize ("OMP_STACKSIZE", &stacksize) - || parse_stacksize ("GOMP_STACKSIZE", &stacksize)) - { - int err; - - err = pthread_attr_setstacksize (&gomp_thread_attr, stacksize); - -#ifdef PTHREAD_STACK_MIN - if (err == EINVAL) - { - if (stacksize < PTHREAD_STACK_MIN) - gomp_error ("Stack size less than minimum of %luk", - PTHREAD_STACK_MIN / 1024ul - + (PTHREAD_STACK_MIN % 1024 != 0)); - else - gomp_error ("Stack size larger than system limit"); - } - else -#endif - if (err != 0) - gomp_error ("Stack size change failed: %s", strerror (err)); - } -} - - -/* The public OpenMP API routines that access these variables. */ - -void -omp_set_num_threads (int n) -{ - struct gomp_task_icv *icv = gomp_icv (true); - icv->nthreads_var = (n > 0 ? n : 1); -} - -void -omp_set_dynamic (int val) -{ - struct gomp_task_icv *icv = gomp_icv (true); - icv->dyn_var = val; -} - -int -omp_get_dynamic (void) -{ - struct gomp_task_icv *icv = gomp_icv (false); - return icv->dyn_var; -} - -void -omp_set_nested (int val) -{ - struct gomp_task_icv *icv = gomp_icv (true); - icv->nest_var = val; -} - -int -omp_get_nested (void) -{ - struct gomp_task_icv *icv = gomp_icv (false); - return icv->nest_var; -} - -void -omp_set_schedule (omp_sched_t kind, int modifier) -{ - struct gomp_task_icv *icv = gomp_icv (true); - switch (kind) - { - case omp_sched_static: - if (modifier < 1) - modifier = 0; - icv->run_sched_modifier = modifier; - break; - case omp_sched_dynamic: - case omp_sched_guided: - if (modifier < 1) - modifier = 1; - icv->run_sched_modifier = modifier; - break; - case omp_sched_auto: - break; - default: - return; - } - icv->run_sched_var = kind; -} - -void -omp_get_schedule (omp_sched_t *kind, int *modifier) -{ - struct gomp_task_icv *icv = gomp_icv (false); - *kind = icv->run_sched_var; - *modifier = icv->run_sched_modifier; -} - -int -omp_get_max_threads (void) -{ - struct gomp_task_icv *icv = gomp_icv (false); - return icv->nthreads_var; -} - -int -omp_get_thread_limit (void) -{ - return gomp_thread_limit_var > INT_MAX ? INT_MAX : gomp_thread_limit_var; -} - -void -omp_set_max_active_levels (int max_levels) -{ - if (max_levels > 0) - gomp_max_active_levels_var = max_levels; -} - -int -omp_get_max_active_levels (void) -{ - return gomp_max_active_levels_var; -} - -ialias (omp_set_dynamic) -ialias (omp_set_nested) -ialias (omp_set_num_threads) -ialias (omp_get_dynamic) -ialias (omp_get_nested) -ialias (omp_set_schedule) -ialias (omp_get_schedule) -ialias (omp_get_max_threads) -ialias (omp_get_thread_limit) -ialias (omp_set_max_active_levels) -ialias (omp_get_max_active_levels) |