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SDL_systhread.c
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SDL_systhread.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* RISC OS version based on pthreads linux source */
#include "SDL_thread.h"
#include "../SDL_systhread.h"
#if SDL_THREADS_DISABLED
int
SDL_SYS_CreateThread (SDL_Thread * thread, void *args)
{
SDL_SetError
("Threads have not been compiled into this version of the library");
return (-1);
}
void
SDL_SYS_SetupThread (void)
{
return;
}
Uint32
SDL_ThreadID (void)
{
return (0);
}
void
SDL_SYS_WaitThread (SDL_Thread * thread)
{
return;
}
void
SDL_SYS_KillThread (SDL_Thread * thread)
{
return;
}
#else
#include <signal.h>
/* List of signals to mask in the subthreads */
static int sig_list[] = {
SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
SIGVTALRM, SIGPROF, 0
};
#include <pthread.h>
int riscos_using_threads = 0;
Uint32 riscos_main_thread = 0; /* Thread running events */
static void *
RunThread (void *data)
{
SDL_RunThread (data);
pthread_exit ((void *) 0);
return ((void *) 0); /* Prevent compiler warning */
}
int
SDL_SYS_CreateThread (SDL_Thread * thread, void *args)
{
pthread_attr_t type;
/* Set the thread attributes */
if (pthread_attr_init (&type) != 0) {
SDL_SetError ("Couldn't initialize pthread attributes");
return (-1);
}
pthread_attr_setdetachstate (&type, PTHREAD_CREATE_JOINABLE);
/* Create the thread and go! */
if (pthread_create (&thread->handle, &type, RunThread, args) != 0) {
SDL_SetError ("Not enough resources to create thread");
return (-1);
}
if (riscos_using_threads == 0) {
riscos_using_threads = 1;
riscos_main_thread = SDL_ThreadID ();
}
return (0);
}
void
SDL_SYS_SetupThread (void)
{
int i;
sigset_t mask;
/* Mask asynchronous signals for this thread */
sigemptyset (&mask);
for (i = 0; sig_list[i]; ++i) {
sigaddset (&mask, sig_list[i]);
}
pthread_sigmask (SIG_BLOCK, &mask, 0);
#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
/* Allow ourselves to be asynchronously cancelled */
{
int oldstate;
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
}
#endif
}
Uint32
SDL_ThreadID (void)
{
return ((Uint32) pthread_self ());
}
void
SDL_SYS_WaitThread (SDL_Thread * thread)
{
pthread_join (thread->handle, 0);
}
void
SDL_SYS_KillThread (SDL_Thread * thread)
{
#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
pthread_cancel (thread->handle);
#else
pthread_kill (thread->handle, SIGKILL);
#endif
}
#endif
/* vi: set ts=4 sw=4 expandtab: */