src/thread/riscos/SDL_systhread.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 01 Feb 2006 06:32:25 +0000
changeset 1312 c9b51268668f
parent 955 d74fbf56f2f6
child 1358 c71e05b4dc2e
permissions -rw-r--r--
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2006 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 
    23 /* RISC OS version based on pthreads linux source */
    24 
    25 #include "SDL_error.h"
    26 #include "SDL_thread.h"
    27 #include "SDL_systhread.h"
    28 
    29 #ifdef DISABLE_THREADS
    30 
    31 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
    32 {
    33 	SDL_SetError("Threads have not been compiled into this version of the library");
    34 	return(-1);
    35 }
    36 
    37 void SDL_SYS_SetupThread(void)
    38 {
    39 	return;
    40 }
    41 
    42 Uint32 SDL_ThreadID(void)
    43 {
    44 	return(0);
    45 }
    46 
    47 void SDL_SYS_WaitThread(SDL_Thread *thread)
    48 {
    49 	return;
    50 }
    51 
    52 void SDL_SYS_KillThread(SDL_Thread *thread)
    53 {
    54 	return;
    55 }
    56 
    57 #else
    58 
    59 #include <signal.h>
    60 
    61 /* List of signals to mask in the subthreads */
    62 static int sig_list[] = {
    63 	SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH,
    64 	SIGVTALRM, SIGPROF, 0
    65 };
    66 
    67 #include <pthread.h>
    68 
    69 int riscos_using_threads = 0;
    70 Uint32 riscos_main_thread = 0; /* Thread running events */
    71 
    72 static void *RunThread(void *data)
    73 {
    74 	SDL_RunThread(data);
    75 	pthread_exit((void*)0);
    76 	return((void *)0);		/* Prevent compiler warning */
    77 }
    78 
    79 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
    80 {
    81 	pthread_attr_t type;
    82 
    83 	/* Set the thread attributes */
    84 	if ( pthread_attr_init(&type) != 0 ) {
    85 		SDL_SetError("Couldn't initialize pthread attributes");
    86 		return(-1);
    87 	}
    88 	pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE);
    89 
    90 	/* Create the thread and go! */
    91 	if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) {
    92 		SDL_SetError("Not enough resources to create thread");
    93 		return(-1);
    94 	}
    95 
    96         if (riscos_using_threads == 0)
    97         {
    98            riscos_using_threads = 1;
    99            riscos_main_thread = SDL_ThreadID();
   100         }
   101       
   102 	return(0);
   103 }
   104 
   105 void SDL_SYS_SetupThread(void)
   106 {
   107 	int i;
   108 	sigset_t mask;
   109 
   110 	/* Mask asynchronous signals for this thread */
   111 	sigemptyset(&mask);
   112 	for ( i=0; sig_list[i]; ++i ) {
   113 		sigaddset(&mask, sig_list[i]);
   114 	}
   115 	pthread_sigmask(SIG_BLOCK, &mask, 0);
   116 	
   117 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
   118 	/* Allow ourselves to be asynchronously cancelled */
   119 	{ int oldstate;
   120 		pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
   121 	}
   122 #endif
   123 }
   124 
   125 Uint32 SDL_ThreadID(void)
   126 {
   127 	return((Uint32)pthread_self());
   128 }
   129 
   130 void SDL_SYS_WaitThread(SDL_Thread *thread)
   131 {
   132 	pthread_join(thread->handle, 0);
   133 }
   134 
   135 void SDL_SYS_KillThread(SDL_Thread *thread)
   136 {
   137 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS
   138 	pthread_cancel(thread->handle);
   139 #else
   140 	pthread_kill(thread->handle, SIGKILL);
   141 #endif
   142 }
   143 
   144 #endif