src/thread/riscos/SDL_systhread.c
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954:3acd16ea0180 955:d74fbf56f2f6
       
     1 /*
       
     2     SDL - Simple DirectMedia Layer
       
     3     Copyright (C) 1997-2004 Sam Lantinga
       
     4 
       
     5     This library is free software; you can redistribute it and/or
       
     6     modify it under the terms of the GNU Library General Public
       
     7     License as published by the Free Software Foundation; either
       
     8     version 2 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     Library General Public License for more details.
       
    14 
       
    15     You should have received a copy of the GNU Library General Public
       
    16     License along with this library; if not, write to the Free
       
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
       
    18 
       
    19     Sam Lantinga
       
    20     slouken@libsdl.org
       
    21 */
       
    22 
       
    23 /* RISC OS version based on pthreads linux source */
       
    24 
       
    25 #ifdef SAVE_RCSID
       
    26 static char rcsid =
       
    27  "@(#) $Id$";
       
    28 #endif
       
    29 
       
    30 #include "SDL_error.h"
       
    31 #include "SDL_thread.h"
       
    32 #include "SDL_systhread.h"
       
    33 
       
    34 #ifdef DISABLE_THREADS
       
    35 
       
    36 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
       
    37 {
       
    38 	SDL_SetError("Threads have not been compiled into this version of the library");
       
    39 	return(-1);
       
    40 }
       
    41 
       
    42 void SDL_SYS_SetupThread(void)
       
    43 {
       
    44 	return;
       
    45 }
       
    46 
       
    47 Uint32 SDL_ThreadID(void)
       
    48 {
       
    49 	return(0);
       
    50 }
       
    51 
       
    52 void SDL_SYS_WaitThread(SDL_Thread *thread)
       
    53 {
       
    54 	return;
       
    55 }
       
    56 
       
    57 void SDL_SYS_KillThread(SDL_Thread *thread)
       
    58 {
       
    59 	return;
       
    60 }
       
    61 
       
    62 #else
       
    63 
       
    64 #include <signal.h>
       
    65 
       
    66 /* List of signals to mask in the subthreads */
       
    67 static int sig_list[] = {
       
    68 	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
       
    69 	SIGVTALRM, SIGPROF, 0
       
    70 };
       
    71 
       
    72 #include <pthread.h>
       
    73 
       
    74 int riscos_using_threads = 0;
       
    75 Uint32 riscos_main_thread = 0; /* Thread running events */
       
    76 
       
    77 static void *RunThread(void *data)
       
    78 {
       
    79 	SDL_RunThread(data);
       
    80 	pthread_exit((void*)0);
       
    81 	return((void *)0);		/* Prevent compiler warning */
       
    82 }
       
    83 
       
    84 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
       
    85 {
       
    86 	pthread_attr_t type;
       
    87 
       
    88 	/* Set the thread attributes */
       
    89 	if ( pthread_attr_init(&type) != 0 ) {
       
    90 		SDL_SetError("Couldn't initialize pthread attributes");
       
    91 		return(-1);
       
    92 	}
       
    93 	pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
       
    94 
       
    95 	/* Create the thread and go! */
       
    96 	if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
       
    97 		SDL_SetError("Not enough resources to create thread");
       
    98 		return(-1);
       
    99 	}
       
   100 
       
   101         if (riscos_using_threads == 0)
       
   102         {
       
   103            riscos_using_threads = 1;
       
   104            riscos_main_thread = SDL_ThreadID();
       
   105         }
       
   106       
       
   107 	return(0);
       
   108 }
       
   109 
       
   110 void SDL_SYS_SetupThread(void)
       
   111 {
       
   112 	int i;
       
   113 	sigset_t mask;
       
   114 
       
   115 	/* Mask asynchronous signals for this thread */
       
   116 	sigemptyset(&mask);
       
   117 	for ( i=0; sig_list[i]; ++i ) {
       
   118 		sigaddset(&mask, sig_list[i]);
       
   119 	}
       
   120 	pthread_sigmask(SIG_BLOCK, &mask, 0);
       
   121 	
       
   122 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
       
   123 	/* Allow ourselves to be asynchronously cancelled */
       
   124 	{ int oldstate;
       
   125 		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
       
   126 	}
       
   127 #endif
       
   128 }
       
   129 
       
   130 Uint32 SDL_ThreadID(void)
       
   131 {
       
   132 	return((Uint32)pthread_self());
       
   133 }
       
   134 
       
   135 void SDL_SYS_WaitThread(SDL_Thread *thread)
       
   136 {
       
   137 	pthread_join(thread->handle, 0);
       
   138 }
       
   139 
       
   140 void SDL_SYS_KillThread(SDL_Thread *thread)
       
   141 {
       
   142 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
       
   143 	pthread_cancel(thread->handle);
       
   144 #else
       
   145 	pthread_kill(thread->handle, SIGKILL);
       
   146 #endif
       
   147 }
       
   148 
       
   149 #endif