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139 lines
4.0 KiB
C
139 lines
4.0 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* gthread.c: thread related functions
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* Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/*
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* MT safe
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*/
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#include "config.h"
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#include "glib.h"
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#include "gthreadprivate.h"
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static gboolean thread_system_already_initialized = FALSE;
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static gint g_thread_priority_map [G_THREAD_PRIORITY_URGENT + 1];
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#include G_THREAD_SOURCE
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#ifndef PRIORITY_LOW_VALUE
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# define PRIORITY_LOW_VALUE 0
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#endif
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#ifndef PRIORITY_URGENT_VALUE
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# define PRIORITY_URGENT_VALUE 0
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#endif
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#ifndef PRIORITY_NORMAL_VALUE
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# define PRIORITY_NORMAL_VALUE \
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((PRIORITY_LOW_VALUE * 6 + PRIORITY_URGENT_VALUE * 4) / 10)
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#endif /* PRIORITY_NORMAL_VALUE */
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#ifndef PRIORITY_HIGH_VALUE
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# define PRIORITY_HIGH_VALUE \
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((PRIORITY_NORMAL_VALUE + PRIORITY_URGENT_VALUE * 2) / 3)
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#endif /* PRIORITY_HIGH_VALUE */
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void
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g_thread_init (GThreadFunctions* init)
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{
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gboolean supported;
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if (thread_system_already_initialized)
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{
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if (init != NULL)
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g_warning ("GThread system already initialized, ignoring custom thread implementation.");
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return;
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}
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thread_system_already_initialized = TRUE;
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if (init == NULL)
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{
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#ifdef HAVE_G_THREAD_IMPL_INIT
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/* now do any initialization stuff required by the
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* implementation, but only if called with a NULL argument, of
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* course. Otherwise it's up to the user to do so. */
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g_thread_impl_init();
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#endif /* HAVE_G_THREAD_IMPL_INIT */
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init = &g_thread_functions_for_glib_use_default;
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}
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else
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g_thread_use_default_impl = FALSE;
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g_thread_functions_for_glib_use = *init;
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supported = (init->mutex_new &&
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init->mutex_lock &&
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init->mutex_trylock &&
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init->mutex_unlock &&
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init->mutex_free &&
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init->cond_new &&
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init->cond_signal &&
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init->cond_broadcast &&
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init->cond_wait &&
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init->cond_timed_wait &&
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init->cond_free &&
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init->private_new &&
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init->private_get &&
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init->private_set &&
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init->thread_create &&
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init->thread_yield &&
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init->thread_join &&
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init->thread_exit &&
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init->thread_set_priority &&
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init->thread_self);
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/* if somebody is calling g_thread_init (), it means that he wants to
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* have thread support, so check this
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*/
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if (!supported)
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{
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if (g_thread_use_default_impl)
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g_error ("Threads are not supported on this platform.");
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else
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g_error ("The supplied thread function vector is invalid.");
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}
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g_thread_priority_map [G_THREAD_PRIORITY_LOW] = PRIORITY_LOW_VALUE;
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g_thread_priority_map [G_THREAD_PRIORITY_NORMAL] = PRIORITY_NORMAL_VALUE;
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g_thread_priority_map [G_THREAD_PRIORITY_HIGH] = PRIORITY_HIGH_VALUE;
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g_thread_priority_map [G_THREAD_PRIORITY_URGENT] = PRIORITY_URGENT_VALUE;
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g_thread_init_glib ();
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}
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void
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g_thread_init_with_errorcheck_mutexes (GThreadFunctions *vtable)
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{
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g_assert (vtable == NULL);
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g_thread_init (NULL);
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}
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