src/thread/SDL_thread_c.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 10 Jul 2013 18:31:17 -0700
changeset 7393 358696c354a8
parent 7011 82bbfbbc720e
child 7482 249d8ecbbb7d
permissions -rw-r--r--
Added release/acquire memory barriers to the atomic API
* Added a destructor to clean up TLS memory at thread shutdown
* Refactored the TLS code to have platform independent code and a small platform dependent core with a fallback to generic code if platform dependent functions fail.
* Fixed recursion issues with SDL_GetErrBuf()
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "SDL_config.h"
    22 
    23 #ifndef _SDL_thread_c_h
    24 #define _SDL_thread_c_h
    25 
    26 /* Need the definitions of SYS_ThreadHandle */
    27 #if SDL_THREADS_DISABLED
    28 #include "generic/SDL_systhread_c.h"
    29 #elif SDL_THREAD_BEOS
    30 #include "beos/SDL_systhread_c.h"
    31 #elif SDL_THREAD_EPOC
    32 #include "epoc/SDL_systhread_c.h"
    33 #elif SDL_THREAD_PTHREAD
    34 #include "pthread/SDL_systhread_c.h"
    35 #elif SDL_THREAD_WINDOWS
    36 #include "windows/SDL_systhread_c.h"
    37 #elif SDL_THREAD_PSP
    38 #include "psp/SDL_systhread_c.h"
    39 #else
    40 #error Need thread implementation for this platform
    41 #include "generic/SDL_systhread_c.h"
    42 #endif
    43 #include "../SDL_error_c.h"
    44 
    45 /* This is the system-independent thread info structure */
    46 struct SDL_Thread
    47 {
    48     SDL_threadID threadid;
    49     SYS_ThreadHandle handle;
    50     int status;
    51     SDL_error errbuf;
    52     char *name;
    53     void *data;
    54 };
    55 
    56 /* This is the function called to run a thread */
    57 extern void SDL_RunThread(void *data);
    58 
    59 /* This is the system-independent thread local storage structure */
    60 typedef struct {
    61     int limit;
    62     struct {
    63         void *data;
    64         void (*destructor)(void*);
    65     } array[1];
    66 } SDL_TLSData;
    67 
    68 /* This is how many TLS entries we allocate at once */
    69 #define TLS_ALLOC_CHUNKSIZE 4
    70 
    71 /* Get cross-platform, slow, thread local storage for this thread.
    72    This is only intended as a fallback if getting real thread-local
    73    storage fails or isn't supported on this platform.
    74  */
    75 extern SDL_TLSData *SDL_Generic_GetTLSData();
    76 
    77 /* Set cross-platform, slow, thread local storage for this thread.
    78    This is only intended as a fallback if getting real thread-local
    79    storage fails or isn't supported on this platform.
    80  */
    81 extern int SDL_Generic_SetTLSData(SDL_TLSData *data);
    82 
    83 #endif /* _SDL_thread_c_h */
    84 
    85 /* vi: set ts=4 sw=4 expandtab: */