mirror of
https://gitlab.gnome.org/GNOME/glib.git
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c9bd7542e1
Wed Jul 26 12:59:31 2000 Tim Janik <timj@gtk.org>
* *.[hc]: applied patch from Andreas Persenius <ndap@swipnet.se> that
updates the license headers to the GNU Lesser General Public License,
as well as updating the copyright year to 2000.
144 lines
4.3 KiB
C
144 lines
4.3 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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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <glib.h>
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static gboolean thread_system_already_initialized = FALSE;
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static gint g_thread_map_priority (GThreadPriority priority);
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static gint g_thread_min_priority = 0;
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static gint g_thread_max_priority = 0;
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#include G_THREAD_SOURCE
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void g_mutex_init (void);
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void g_mem_init (void);
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void g_messages_init (void);
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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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#ifndef G_THREADS_ENABLED
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g_error ("GLib thread support is disabled.");
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#endif /* !G_THREADS_ENABLED */
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if (thread_system_already_initialized)
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g_error ("GThread system may only be initialized once.");
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thread_system_already_initialized = TRUE;
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if (init == NULL)
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init = &g_thread_functions_for_glib_use_default;
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else
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g_thread_use_default_impl = FALSE;
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#if defined (G_OS_WIN32) && defined (__GNUC__)
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memcpy(&g_thread_functions_for_glib_use, init, sizeof (*init));
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#else
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g_thread_functions_for_glib_use = *init;
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#endif
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/* It is important, that g_threads_got_initialized is not set before the
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* thread initialization functions of the different modules are called
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*/
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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_get);
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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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/* now do any initialization stuff required by the implementation,
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* but only if called with a NULL argument, of course. Otherwise
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* it's up to the user to do so. */
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#ifdef HAVE_G_THREAD_IMPL_INIT
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if (g_thread_use_default_impl)
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g_thread_impl_init();
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#endif
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/* now call the thread initialization functions of the different
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* glib modules. order does matter, g_mutex_init MUST come first.
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*/
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g_mutex_init ();
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g_mem_init ();
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g_messages_init ();
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/* now we can set g_threads_got_initialized and thus enable
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* all the thread functions
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*/
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g_threads_got_initialized = TRUE;
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/* we want the main thread to run with normal priority */
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g_thread_set_priority (g_thread_self(), G_THREAD_PRIORITY_NORMAL);
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}
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static gint
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g_thread_map_priority (GThreadPriority priority)
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{
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guint procent;
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switch (priority)
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{
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case G_THREAD_PRIORITY_LOW: procent = 0; break;
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default: case G_THREAD_PRIORITY_NORMAL: procent = 40; break;
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case G_THREAD_PRIORITY_HIGH: procent = 80; break;
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case G_THREAD_PRIORITY_URGENT: procent = 100; break;
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}
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return g_thread_min_priority +
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(g_thread_max_priority - g_thread_min_priority) * procent / 100;
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}
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