diff -r 000000000000 -r e4d67989cc36 glib/libgthread/src/gthread-posix.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/glib/libgthread/src/gthread-posix.c Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,496 @@ +/* GLIB - Library of useful routines for C programming + * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald + * + * gthread.c: posix thread system implementation + * Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe + * Portions copyright (c) 2006 Nokia Corporation. All rights reserved. + * + * This library is free software; you can redistribute it and/or + * 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 + * Lesser General Public License for more details. + * + * 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 + +#include +#include +#include +#ifdef HAVE_SYS_TIME_H +# include +#endif +#ifdef HAVE_UNISTD_H +# include +#endif + +#ifdef HAVE_SCHED_H +#include +#endif + +#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 +#if EMULATOR +PLS(posix_check_cmd_prio_warned,gthread_posix,gboolean) +#define posix_check_cmd_prio_warned (*FUNCTION_NAME(posix_check_cmd_prio_warned,gthread_posix)()) +#else +static gboolean posix_check_cmd_prio_warned = FALSE; +#endif /* EMULATOR */ +# 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 +#if EMULATOR + +PLS(priority_normal_value,gthread_posix,gint) +#define priority_normal_value (*FUNCTION_NAME(priority_normal_value,gthread_posix)()) + +#else + +static gint priority_normal_value; + +#endif /* EMULATOR */ +# 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 */ + +#if EMULATOR + +PLS(g_thread_min_stack_size ,gthread_posix,gulong) +#define g_thread_min_stack_size (*FUNCTION_NAME(g_thread_min_stack_size ,gthread_posix)()) + +#else + +static gulong g_thread_min_stack_size = 0; + +#endif /* EMULATOR */ +#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_cmd (pthread_mutex_init ((pthread_mutex_t *) result, + mutexattr_default)); + return result; +} + +static void +g_mutex_free_posix_impl (GMutex * 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 + functions from gmem.c and gmessages.c; */ + +/* pthread_mutex_lock, pthread_mutex_unlock can be taken directly, as + signature and semantic are right, but without error check then!!!!, + we might want to change this therefore. */ + +static gboolean +g_mutex_trylock_posix_impl (GMutex * mutex) +{ + int result; + + result = pthread_mutex_trylock ((pthread_mutex_t *) mutex); + +#ifdef G_THREADS_IMPL_POSIX + if (result == EBUSY) + return FALSE; +#else /* G_THREADS_IMPL_DCE */ + if (result == 0) + return FALSE; +#endif + + posix_check_err (posix_error (result), "pthread_mutex_trylock"); + return TRUE; +} + +static GCond * +g_cond_new_posix_impl (void) +{ + GCond *result = (GCond *) g_new (pthread_cond_t, 1); + 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. */ + +#define G_NSEC_PER_SEC 1000000000 + +static gboolean +g_cond_timed_wait_posix_impl (GCond * cond, + GMutex * entered_mutex, + GTimeVal * abs_time) +{ + int result; + struct timespec end_time; + gboolean timed_out; + + g_return_val_if_fail (cond != NULL, FALSE); + g_return_val_if_fail (entered_mutex != NULL, FALSE); + + if (!abs_time) + { + g_cond_wait (cond, entered_mutex); + return TRUE; + } + + 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 + + if (!timed_out) + posix_check_err (posix_error (result), "pthread_cond_timedwait"); + return !timed_out; +} + +static void +g_cond_free_posix_impl (GCond * cond) +{ + posix_check_cmd (pthread_cond_destroy ((pthread_cond_t *) cond)); + g_free (cond); +} + +static GPrivate * +g_private_new_posix_impl (GDestroyNotify destructor) +{ + GPrivate *result = (GPrivate *) g_new (pthread_key_t, 1); + posix_check_cmd (pthread_key_create ((pthread_key_t *) result, destructor)); + return result; +} + +/* NOTE: the functions g_private_get and g_private_set may not use + functions from gmem.c and gmessages.c */ + +static void +g_private_set_posix_impl (GPrivate * private_key, gpointer value) +{ + if (!private_key) + return; + pthread_setspecific (*(pthread_key_t *) private_key, value); +} + +static gpointer +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); +} + +#if EMULATOR + +PLS(g_thread_functions_for_glib_use_default ,gthread_posix,GThreadFunctions) +#define g_thread_functions_for_glib_use_default (*FUNCTION_NAME(g_thread_functions_for_glib_use_default ,gthread_posix)()) + +const GThreadFunctions temp_g_thread_functions_for_glib_use_default = +{ + g_mutex_new_posix_impl, + (void (*)(GMutex *)) pthread_mutex_lock, + g_mutex_trylock_posix_impl, + (void (*)(GMutex *)) pthread_mutex_unlock, + g_mutex_free_posix_impl, + g_cond_new_posix_impl, + (void (*)(GCond *)) pthread_cond_signal, + (void (*)(GCond *)) pthread_cond_broadcast, + (void (*)(GCond *, GMutex *)) pthread_cond_wait, + g_cond_timed_wait_posix_impl, + g_cond_free_posix_impl, + g_private_new_posix_impl, + g_private_get_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 +}; + + +#else + + static const GThreadFunctions g_thread_functions_for_glib_use_default = +{ + g_mutex_new_posix_impl, + (void (*)(GMutex *)) pthread_mutex_lock, + g_mutex_trylock_posix_impl, + (void (*)(GMutex *)) pthread_mutex_unlock, + g_mutex_free_posix_impl, + g_cond_new_posix_impl, + (void (*)(GCond *)) pthread_cond_signal, + (void (*)(GCond *)) pthread_cond_broadcast, + (void (*)(GCond *, GMutex *)) pthread_cond_wait, + g_cond_timed_wait_posix_impl, + g_cond_free_posix_impl, + g_private_new_posix_impl, + g_private_get_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 +}; + +#endif /* EMULATOR */