1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997-2012 Sam Lantinga
4
5    This library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9
10    This library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14
15    You should have received a copy of the GNU Lesser General Public
16    License along with this library; if not, write to the Free Software
17    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18
19    Sam Lantinga
20    slouken@libsdl.org
21*/
22#include "SDL_config.h"
23
24/*
25 *	GNU pth threads
26 *
27 *	Patrice Mandin
28 */
29
30#include <pth.h>
31#include <signal.h>
32
33#include "SDL_thread.h"
34#include "../SDL_thread_c.h"
35#include "../SDL_systhread.h"
36
37/* List of signals to mask in the subthreads */
38static int sig_list[] = {
39	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
40	SIGVTALRM, SIGPROF, 0
41};
42
43static void *RunThread(void *data)
44{
45	SDL_RunThread(data);
46	pth_exit((void*)0);
47	return((void *)0);		/* Prevent compiler warning */
48}
49
50int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
51{
52	pth_attr_t type;
53
54	/* Create a new attribute */
55	type = pth_attr_new();
56	if ( type == NULL ) {
57		SDL_SetError("Couldn't initialize pth attributes");
58		return(-1);
59	}
60	pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE);
61
62	/* Create the thread and go! */
63	thread->handle = pth_spawn(type, RunThread, args);
64	if ( thread->handle == NULL ) {
65		SDL_SetError("Not enough resources to create thread");
66		return(-1);
67	}
68	return(0);
69}
70
71void SDL_SYS_SetupThread(void)
72{
73	int i;
74	sigset_t mask;
75	int oldstate;
76
77	/* Mask asynchronous signals for this thread */
78	sigemptyset(&mask);
79	for ( i=0; sig_list[i]; ++i ) {
80		sigaddset(&mask, sig_list[i]);
81	}
82	pth_sigmask(SIG_BLOCK, &mask, 0);
83
84	/* Allow ourselves to be asynchronously cancelled */
85	pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate);
86}
87
88/* WARNING:  This may not work for systems with 64-bit pid_t */
89Uint32 SDL_ThreadID(void)
90{
91	return((Uint32)pth_self());
92}
93
94void SDL_SYS_WaitThread(SDL_Thread *thread)
95{
96	pth_join(thread->handle, NULL);
97}
98
99void SDL_SYS_KillThread(SDL_Thread *thread)
100{
101	pth_cancel(thread->handle);
102	pth_join(thread->handle, NULL);
103}
104