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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 /* |
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25 * GNU pth threads |
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26 * |
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27 * Patrice Mandin |
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28 */ |
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29 |
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30 #include <pth.h> |
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31 #include <signal.h> |
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32 |
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33 #include "SDL_thread.h" |
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34 #include "../SDL_thread_c.h" |
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35 #include "../SDL_systhread.h" |
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36 |
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37 /* List of signals to mask in the subthreads */ |
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38 static int sig_list[] = { |
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39 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH, |
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40 SIGVTALRM, SIGPROF, 0 |
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41 }; |
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42 |
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43 static void *RunThread(void *data) |
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44 { |
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45 SDL_RunThread(data); |
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46 pth_exit((void*)0); |
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47 return((void *)0); /* Prevent compiler warning */ |
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48 } |
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49 |
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50 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
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51 { |
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52 pth_attr_t type; |
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53 |
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54 /* Create a new attribute */ |
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55 type = pth_attr_new(); |
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56 if ( type == NULL ) { |
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57 SDL_SetError("Couldn't initialize pth attributes"); |
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58 return(-1); |
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59 } |
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60 pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE); |
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61 |
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62 /* Create the thread and go! */ |
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63 thread->handle = pth_spawn(type, RunThread, args); |
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64 if ( thread->handle == NULL ) { |
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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 return(0); |
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69 } |
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70 |
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71 void SDL_SYS_SetupThread(void) |
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72 { |
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73 int i; |
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74 sigset_t mask; |
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75 int oldstate; |
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76 |
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77 /* Mask asynchronous signals for this thread */ |
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78 sigemptyset(&mask); |
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79 for ( i=0; sig_list[i]; ++i ) { |
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80 sigaddset(&mask, sig_list[i]); |
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81 } |
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82 pth_sigmask(SIG_BLOCK, &mask, 0); |
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83 |
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84 /* Allow ourselves to be asynchronously cancelled */ |
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85 pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate); |
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86 } |
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87 |
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88 /* WARNING: This may not work for systems with 64-bit pid_t */ |
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89 Uint32 SDL_ThreadID(void) |
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90 { |
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91 return((Uint32)pth_self()); |
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92 } |
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93 |
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94 void SDL_SYS_WaitThread(SDL_Thread *thread) |
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95 { |
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96 pth_join(thread->handle, NULL); |
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97 } |
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98 |
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99 void SDL_SYS_KillThread(SDL_Thread *thread) |
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100 { |
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101 pth_cancel(thread->handle); |
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102 pth_join(thread->handle, NULL); |
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103 } |