SDL_systhread.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 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
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slouken@libsdl.org
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/*
* GNU pth threads
*
* Patrice Mandin
*/
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#include "SDL_error.h"
#include "SDL_thread.h"
#include "SDL_systhread.h"
#include <signal.h>
#include <pth.h>
/* List of signals to mask in the subthreads */
static int sig_list[] = {
SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
SIGVTALRM, SIGPROF, 0
};
static void *RunThread(void *data)
{
SDL_RunThread(data);
pth_exit((void*)0);
return((void *)0); /* Prevent compiler warning */
}
int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
{
pth_attr_t type;
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/* Create a new attribute */
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type = pth_attr_new();
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if ( type == NULL ) {
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SDL_SetError("Couldn't initialize pth attributes");
return(-1);
}
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pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
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/* Create the thread and go! */
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thread->handle = pth_spawn(type, RunThread, args);
if ( thread->handle == NULL ) {
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SDL_SetError("Not enough resources to create thread");
return(-1);
}
return(0);
}
void SDL_SYS_SetupThread(void)
{
int i;
sigset_t mask;
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int oldstate;
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/* Mask asynchronous signals for this thread */
sigemptyset(&mask);
for ( i=0; sig_list[i]; ++i ) {
sigaddset(&mask, sig_list[i]);
}
pth_sigmask(SIG_BLOCK, &mask, 0);
/* Allow ourselves to be asynchronously cancelled */
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pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
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}
/* WARNING: This may not work for systems with 64-bit pid_t */
Uint32 SDL_ThreadID(void)
{
return((Uint32)pth_self());
}
void SDL_SYS_WaitThread(SDL_Thread *thread)
{
pth_join(thread->handle, 0);
}
void SDL_SYS_KillThread(SDL_Thread *thread)
{
pth_cancel(thread->handle);
pth_join(thread->handle, NULL);
}