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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 #include <pthread.h> |
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25 #include <signal.h> |
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26 |
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27 #include "SDL_thread.h" |
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28 #include "../SDL_thread_c.h" |
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29 #include "../SDL_systhread.h" |
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30 |
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31 /* List of signals to mask in the subthreads */ |
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32 static int sig_list[] = { |
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33 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH, |
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34 SIGVTALRM, SIGPROF, 0 |
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35 }; |
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36 |
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37 #ifdef __RISCOS__ |
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38 /* RISC OS needs to know the main thread for |
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39 * it's timer and event processing. */ |
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40 int riscos_using_threads = 0; |
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41 Uint32 riscos_main_thread = 0; /* Thread running events */ |
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42 #endif |
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43 |
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44 |
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45 static void *RunThread(void *data) |
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46 { |
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47 SDL_RunThread(data); |
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48 pthread_exit((void*)0); |
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49 return((void *)0); /* Prevent compiler warning */ |
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50 } |
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51 |
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52 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
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53 { |
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54 pthread_attr_t type; |
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55 |
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56 /* Set the thread attributes */ |
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57 if ( pthread_attr_init(&type) != 0 ) { |
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58 SDL_SetError("Couldn't initialize pthread attributes"); |
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59 return(-1); |
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60 } |
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61 pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE); |
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62 |
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63 /* Create the thread and go! */ |
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64 if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) { |
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65 SDL_SetError("Not enough resources to create thread"); |
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66 return(-1); |
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67 } |
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68 |
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69 #ifdef __RISCOS__ |
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70 if (riscos_using_threads == 0) { |
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71 riscos_using_threads = 1; |
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72 riscos_main_thread = SDL_ThreadID(); |
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73 } |
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74 #endif |
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75 |
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76 return(0); |
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77 } |
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78 |
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79 void SDL_SYS_SetupThread(void) |
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80 { |
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81 int i; |
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82 sigset_t mask; |
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83 |
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84 /* Mask asynchronous signals for this thread */ |
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85 sigemptyset(&mask); |
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86 for ( i=0; sig_list[i]; ++i ) { |
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87 sigaddset(&mask, sig_list[i]); |
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88 } |
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89 pthread_sigmask(SIG_BLOCK, &mask, 0); |
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90 |
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91 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS |
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92 /* Allow ourselves to be asynchronously cancelled */ |
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93 { int oldstate; |
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94 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate); |
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95 } |
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96 #endif |
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97 } |
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98 |
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99 /* WARNING: This may not work for systems with 64-bit pid_t */ |
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100 Uint32 SDL_ThreadID(void) |
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101 { |
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102 return((Uint32)pthread_self()); |
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103 } |
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104 |
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105 void SDL_SYS_WaitThread(SDL_Thread *thread) |
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106 { |
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107 pthread_join(thread->handle, 0); |
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108 } |
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109 |
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110 void SDL_SYS_KillThread(SDL_Thread *thread) |
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111 { |
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112 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS |
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113 pthread_cancel(thread->handle); |
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114 #else |
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115 #ifdef __FREEBSD__ |
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116 #warning For some reason, this doesnt actually kill a thread - FreeBSD 3.2 |
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117 #endif |
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118 pthread_kill(thread->handle, SIGKILL); |
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119 #endif |
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120 } |