X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gthread%2Fgthread-posix.c;h=633dcdbe99a2777ea168e2b6ddc10b87608f58f2;hb=2107d8e3edc9e8414e1d83d45d458a3f205a53e7;hp=4af75916c19e3f7dc662a7ffddb494ebaf2445b4;hpb=2c30e8620fe66dedf35ee294bcd70051bde8685f;p=platform%2Fupstream%2Fglib.git diff --git a/gthread/gthread-posix.c b/gthread/gthread-posix.c index 4af7591..633dcdb 100644 --- a/gthread/gthread-posix.c +++ b/gthread/gthread-posix.c @@ -5,53 +5,160 @@ * Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe * * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public + * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 - * Library General Public License for more details. + * Lesser General Public License for more details. * - * You should have received a copy of the GNU Library General Public + * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ -/* +/* + * Modified by the GLib Team and others 1997-2000. See the AUTHORS + * file for a list of people on the GLib Team. See the ChangeLog + * files for a list of changes. These files are distributed with + * GLib at ftp://ftp.gtk.org/pub/gtk/. + */ + +/* * MT safe */ +#include "config.h" + #include #include #include -#include +#ifdef HAVE_SYS_TIME_H +# include +#endif +#ifdef HAVE_UNISTD_H +# include +#endif -#define posix_print_error( name, num ) \ - g_error( "file %s: line %d (%s): error %s during %s", \ - __FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \ - g_strerror((num)), #name ) +#ifdef HAVE_SCHED_H +#include +#endif -#define posix_check_for_error( what ) G_STMT_START{ \ - int error = (what); \ - if( error ) { posix_print_error( what, error ); } \ +#define posix_check_err(err, name) G_STMT_START{ \ + int error = (err); \ + if (error) \ + g_error ("file %s: line %d (%s): error '%s' during '%s'", \ + __FILE__, __LINE__, G_GNUC_PRETTY_FUNCTION, \ + g_strerror (error), name); \ }G_STMT_END +#define posix_check_cmd(cmd) posix_check_err (posix_error (cmd), #cmd) + +#ifdef G_ENABLE_DEBUG +static gboolean posix_check_cmd_prio_warned = FALSE; +# define posix_check_cmd_prio(cmd) G_STMT_START{ \ + int err = posix_error (cmd); \ + if (err == EPERM) \ + { \ + if (!posix_check_cmd_prio_warned) \ + { \ + posix_check_cmd_prio_warned = TRUE; \ + g_warning ("Priorities can only be changed " \ + "(resp. increased) by root."); \ + } \ + } \ + else \ + posix_check_err (err, #cmd); \ + }G_STMT_END +#else /* G_ENABLE_DEBUG */ +# define posix_check_cmd_prio(cmd) G_STMT_START{ \ + int err = posix_error (cmd); \ + if (err != EPERM) \ + posix_check_err (err, #cmd); \ + }G_STMT_END +#endif /* G_ENABLE_DEBUG */ + +#if defined(G_THREADS_IMPL_POSIX) +# define posix_error(what) (what) +# define mutexattr_default NULL +# define condattr_default NULL +#elif defined(G_THREADS_IMPL_DCE) +# define posix_error(what) ((what) == -1 ? errno : 0) +# define pthread_key_create(a, b) pthread_keycreate (a, b) +# define pthread_attr_init(a) pthread_attr_create (a) +# define pthread_attr_destroy(a) pthread_attr_delete (a) +# define pthread_create(a, b, c, d) pthread_create (a, *b, c, d) +# define mutexattr_default (pthread_mutexattr_default) +# define condattr_default (pthread_condattr_default) +#else /* neither G_THREADS_IMPL_POSIX nor G_THREADS_IMPL_DCE are defined */ +# error This should not happen. Contact the GLib team. +#endif + +#if defined (POSIX_MIN_PRIORITY) && defined (POSIX_MAX_PRIORITY) +# define HAVE_PRIORITIES 1 +static gint priority_normal_value; +# ifdef __FreeBSD__ + /* FreeBSD threads use different priority values from the POSIX_ + * defines so we just set them here. The corresponding macros + * PTHREAD_MIN_PRIORITY and PTHREAD_MAX_PRIORITY are implied to be + * exported by the docs, but they aren't. + */ +# define PRIORITY_LOW_VALUE 0 +# define PRIORITY_URGENT_VALUE 31 +# else /* !__FreeBSD__ */ +# define PRIORITY_LOW_VALUE POSIX_MIN_PRIORITY +# define PRIORITY_URGENT_VALUE POSIX_MAX_PRIORITY +# endif /* !__FreeBSD__ */ +# define PRIORITY_NORMAL_VALUE priority_normal_value +#endif /* POSIX_MIN_PRIORITY && POSIX_MAX_PRIORITY */ + +static gulong g_thread_min_stack_size = 0; + +#define G_MUTEX_SIZE (sizeof (pthread_mutex_t)) + +#if defined(_SC_THREAD_STACK_MIN) || defined (HAVE_PRIORITIES) +#define HAVE_G_THREAD_IMPL_INIT +static void +g_thread_impl_init(void) +{ +#ifdef _SC_THREAD_STACK_MIN + g_thread_min_stack_size = MAX (sysconf (_SC_THREAD_STACK_MIN), 0); +#endif /* _SC_THREAD_STACK_MIN */ +#ifdef HAVE_PRIORITIES +# ifdef G_THREADS_IMPL_POSIX + { + struct sched_param sched; + int policy; + posix_check_cmd (pthread_getschedparam (pthread_self(), &policy, &sched)); + priority_normal_value = sched.sched_priority; + } +# else /* G_THREADS_IMPL_DCE */ + posix_check_cmd (priority_normal_value = + pthread_getprio (*(pthread_t*)thread, + g_thread_priority_map [priority])); +# endif +#endif /* HAVE_PRIORITIES */ + +} +#endif /* _SC_THREAD_STACK_MIN || HAVE_PRIORITIES */ + static GMutex * g_mutex_new_posix_impl (void) { GMutex *result = (GMutex *) g_new (pthread_mutex_t, 1); - posix_check_for_error (pthread_mutex_init ((pthread_mutex_t *) result, NULL)); + posix_check_cmd (pthread_mutex_init ((pthread_mutex_t *) result, + mutexattr_default)); return result; } static void g_mutex_free_posix_impl (GMutex * mutex) { - posix_check_for_error (pthread_mutex_destroy ((pthread_mutex_t *) mutex)); - free (mutex); + posix_check_cmd (pthread_mutex_destroy ((pthread_mutex_t *) mutex)); + g_free (mutex); } /* NOTE: the functions g_mutex_lock and g_mutex_unlock may not use @@ -67,10 +174,16 @@ g_mutex_trylock_posix_impl (GMutex * mutex) int result; result = pthread_mutex_trylock ((pthread_mutex_t *) mutex); - if (result != EBUSY) + +#ifdef G_THREADS_IMPL_POSIX + if (result == EBUSY) return FALSE; +#else /* G_THREADS_IMPL_DCE */ + if (result == 0) + return FALSE; +#endif - posix_check_for_error (result); + posix_check_err (posix_error (result), "pthread_mutex_trylock"); return TRUE; } @@ -78,17 +191,17 @@ static GCond * g_cond_new_posix_impl (void) { GCond *result = (GCond *) g_new (pthread_cond_t, 1); - posix_check_for_error (pthread_cond_init ((pthread_cond_t *) result, NULL)); + posix_check_cmd (pthread_cond_init ((pthread_cond_t *) result, + condattr_default)); return result; } /* pthread_cond_signal, pthread_cond_broadcast and pthread_cond_wait can be taken directly, as signature and semantic are right, but without error check then!!!!, we might want to change this - therfore. */ + therefore. */ -#define G_MICROSEC 1000000 -#define G_NANOSEC 1000000000 +#define G_NSEC_PER_SEC 1000000000 static gboolean g_cond_timed_wait_posix_impl (GCond * cond, @@ -104,26 +217,37 @@ g_cond_timed_wait_posix_impl (GCond * cond, if (!abs_time) { - g_cond_wait (cond, entered_mutex); - return TRUE; + result = pthread_cond_wait ((pthread_cond_t *)cond, + (pthread_mutex_t *) entered_mutex); + timed_out = FALSE; + } + else + { + end_time.tv_sec = abs_time->tv_sec; + end_time.tv_nsec = abs_time->tv_usec * (G_NSEC_PER_SEC / G_USEC_PER_SEC); + + g_return_val_if_fail (end_time.tv_nsec < G_NSEC_PER_SEC, TRUE); + + result = pthread_cond_timedwait ((pthread_cond_t *) cond, + (pthread_mutex_t *) entered_mutex, + &end_time); +#ifdef G_THREADS_IMPL_POSIX + timed_out = (result == ETIMEDOUT); +#else /* G_THREADS_IMPL_DCE */ + timed_out = (result == -1) && (errno == EAGAIN); +#endif } - end_time.tv_sec = abs_time->tv_sec; - end_time.tv_nsec = abs_time->tv_usec * (G_NANOSEC / G_MICROSEC); - g_assert (end_time.tv_nsec < G_NANOSEC); - result = pthread_cond_timedwait ((pthread_cond_t *) cond, - (pthread_mutex_t *) entered_mutex, - &end_time); - timed_out = (result == ETIMEDOUT); if (!timed_out) - posix_check_for_error (result); + posix_check_err (posix_error (result), "pthread_cond_timedwait"); + return !timed_out; } static void g_cond_free_posix_impl (GCond * cond) { - posix_check_for_error (pthread_cond_destroy ((pthread_cond_t *) cond)); + posix_check_cmd (pthread_cond_destroy ((pthread_cond_t *) cond)); g_free (cond); } @@ -131,8 +255,7 @@ static GPrivate * g_private_new_posix_impl (GDestroyNotify destructor) { GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1); - posix_check_for_error (pthread_key_create ((pthread_key_t *) result, - destructor)); + posix_check_cmd (pthread_key_create ((pthread_key_t *) result, destructor)); return result; } @@ -144,7 +267,6 @@ g_private_set_posix_impl (GPrivate * private_key, gpointer value) { if (!private_key) return; - pthread_setspecific (*(pthread_key_t *) private_key, value); } @@ -153,8 +275,144 @@ g_private_get_posix_impl (GPrivate * private_key) { if (!private_key) return NULL; - +#ifdef G_THREADS_IMPL_POSIX return pthread_getspecific (*(pthread_key_t *) private_key); +#else /* G_THREADS_IMPL_DCE */ + { + void* data; + posix_check_cmd (pthread_getspecific (*(pthread_key_t *) private_key, + &data)); + return data; + } +#endif +} + +static void +g_thread_create_posix_impl (GThreadFunc thread_func, + gpointer arg, + gulong stack_size, + gboolean joinable, + gboolean bound, + GThreadPriority priority, + gpointer thread, + GError **error) +{ + pthread_attr_t attr; + gint ret; + + g_return_if_fail (thread_func); + g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW); + g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT); + + posix_check_cmd (pthread_attr_init (&attr)); + +#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE + if (stack_size) + { + stack_size = MAX (g_thread_min_stack_size, stack_size); + /* No error check here, because some systems can't do it and + * we simply don't want threads to fail because of that. */ + pthread_attr_setstacksize (&attr, stack_size); + } +#endif /* HAVE_PTHREAD_ATTR_SETSTACKSIZE */ + +#ifdef PTHREAD_SCOPE_SYSTEM + if (bound) + /* No error check here, because some systems can't do it and we + * simply don't want threads to fail because of that. */ + pthread_attr_setscope (&attr, PTHREAD_SCOPE_SYSTEM); +#endif /* PTHREAD_SCOPE_SYSTEM */ + +#ifdef G_THREADS_IMPL_POSIX + posix_check_cmd (pthread_attr_setdetachstate (&attr, + joinable ? PTHREAD_CREATE_JOINABLE : PTHREAD_CREATE_DETACHED)); +#endif /* G_THREADS_IMPL_POSIX */ + +#ifdef HAVE_PRIORITIES +# ifdef G_THREADS_IMPL_POSIX + { + struct sched_param sched; + posix_check_cmd (pthread_attr_getschedparam (&attr, &sched)); + sched.sched_priority = g_thread_priority_map [priority]; + posix_check_cmd_prio (pthread_attr_setschedparam (&attr, &sched)); + } +# else /* G_THREADS_IMPL_DCE */ + posix_check_cmd_prio + (pthread_attr_setprio (&attr, g_thread_priority_map [priority])); +# endif /* G_THREADS_IMPL_DCE */ +#endif /* HAVE_PRIORITIES */ + ret = posix_error (pthread_create (thread, &attr, + (void* (*)(void*))thread_func, arg)); + + posix_check_cmd (pthread_attr_destroy (&attr)); + + if (ret == EAGAIN) + { + g_set_error (error, G_THREAD_ERROR, G_THREAD_ERROR_AGAIN, + "Error creating thread: %s", g_strerror (ret)); + return; + } + + posix_check_err (ret, "pthread_create"); + +#ifdef G_THREADS_IMPL_DCE + if (!joinable) + posix_check_cmd (pthread_detach (thread)); +#endif /* G_THREADS_IMPL_DCE */ +} + +static void +g_thread_yield_posix_impl (void) +{ + POSIX_YIELD_FUNC; +} + +static void +g_thread_join_posix_impl (gpointer thread) +{ + gpointer ignore; + posix_check_cmd (pthread_join (*(pthread_t*)thread, &ignore)); +} + +static void +g_thread_exit_posix_impl (void) +{ + pthread_exit (NULL); +} + +static void +g_thread_set_priority_posix_impl (gpointer thread, GThreadPriority priority) +{ + g_return_if_fail (priority >= G_THREAD_PRIORITY_LOW); + g_return_if_fail (priority <= G_THREAD_PRIORITY_URGENT); +#ifdef HAVE_PRIORITIES +# ifdef G_THREADS_IMPL_POSIX + { + struct sched_param sched; + int policy; + posix_check_cmd (pthread_getschedparam (*(pthread_t*)thread, &policy, + &sched)); + sched.sched_priority = g_thread_priority_map [priority]; + posix_check_cmd_prio (pthread_setschedparam (*(pthread_t*)thread, policy, + &sched)); + } +# else /* G_THREADS_IMPL_DCE */ + posix_check_cmd_prio (pthread_setprio (*(pthread_t*)thread, + g_thread_priority_map [priority])); +# endif +#endif /* HAVE_PRIORITIES */ +} + +static void +g_thread_self_posix_impl (gpointer thread) +{ + *(pthread_t*)thread = pthread_self(); +} + +static gboolean +g_thread_equal_posix_impl (gpointer thread1, gpointer thread2) +{ + return (pthread_equal (*(pthread_t*)thread1, *(pthread_t*)thread2) != 0); } static GThreadFunctions g_thread_functions_for_glib_use_default = @@ -172,5 +430,12 @@ static GThreadFunctions g_thread_functions_for_glib_use_default = g_cond_free_posix_impl, g_private_new_posix_impl, g_private_get_posix_impl, - g_private_set_posix_impl + g_private_set_posix_impl, + g_thread_create_posix_impl, + g_thread_yield_posix_impl, + g_thread_join_posix_impl, + g_thread_exit_posix_impl, + g_thread_set_priority_posix_impl, + g_thread_self_posix_impl, + g_thread_equal_posix_impl };