SDL_systhread.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2012 Sam Lantinga
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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 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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/* RISC OS version based on pthreads linux source */
#include "SDL_thread.h"
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#include "../SDL_systhread.h"
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#if SDL_THREADS_DISABLED
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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