mirror of
https://github.com/shawns-valve/halflife.git
synced 2024-11-24 21:21:15 +00:00
182 lines
6 KiB
C
182 lines
6 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
#ifndef _SDL_thread_h
|
|
#define _SDL_thread_h
|
|
|
|
/**
|
|
* \file SDL_thread.h
|
|
*
|
|
* Header for the SDL thread management routines.
|
|
*/
|
|
|
|
#include "SDL_stdinc.h"
|
|
#include "SDL_error.h"
|
|
|
|
/* Thread synchronization primitives */
|
|
#include "SDL_mutex.h"
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
/* *INDENT-OFF* */
|
|
extern "C" {
|
|
/* *INDENT-ON* */
|
|
#endif
|
|
|
|
/* The SDL thread structure, defined in SDL_thread.c */
|
|
struct SDL_Thread;
|
|
typedef struct SDL_Thread SDL_Thread;
|
|
|
|
/* The SDL thread ID */
|
|
typedef unsigned long SDL_threadID;
|
|
|
|
/* The SDL thread priority
|
|
*
|
|
* Note: On many systems you require special privileges to set high priority.
|
|
*/
|
|
typedef enum {
|
|
SDL_THREAD_PRIORITY_LOW,
|
|
SDL_THREAD_PRIORITY_NORMAL,
|
|
SDL_THREAD_PRIORITY_HIGH
|
|
} SDL_ThreadPriority;
|
|
|
|
/* The function passed to SDL_CreateThread()
|
|
It is passed a void* user context parameter and returns an int.
|
|
*/
|
|
typedef int (SDLCALL * SDL_ThreadFunction) (void *data);
|
|
|
|
#if defined(__WIN32__) && !defined(HAVE_LIBC)
|
|
/**
|
|
* \file SDL_thread.h
|
|
*
|
|
* We compile SDL into a DLL. This means, that it's the DLL which
|
|
* creates a new thread for the calling process with the SDL_CreateThread()
|
|
* API. There is a problem with this, that only the RTL of the SDL.DLL will
|
|
* be initialized for those threads, and not the RTL of the calling
|
|
* application!
|
|
*
|
|
* To solve this, we make a little hack here.
|
|
*
|
|
* We'll always use the caller's _beginthread() and _endthread() APIs to
|
|
* start a new thread. This way, if it's the SDL.DLL which uses this API,
|
|
* then the RTL of SDL.DLL will be used to create the new thread, and if it's
|
|
* the application, then the RTL of the application will be used.
|
|
*
|
|
* So, in short:
|
|
* Always use the _beginthread() and _endthread() of the calling runtime
|
|
* library!
|
|
*/
|
|
#define SDL_PASSED_BEGINTHREAD_ENDTHREAD
|
|
#include <process.h> /* This has _beginthread() and _endthread() defined! */
|
|
|
|
typedef uintptr_t(__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
|
|
unsigned (__stdcall *
|
|
func) (void
|
|
*),
|
|
void *arg, unsigned,
|
|
unsigned *threadID);
|
|
typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
|
|
|
|
/**
|
|
* Create a thread.
|
|
*/
|
|
extern DECLSPEC SDL_Thread *SDLCALL
|
|
SDL_CreateThread(SDL_ThreadFunction fn, const char *name, void *data,
|
|
pfnSDL_CurrentBeginThread pfnBeginThread,
|
|
pfnSDL_CurrentEndThread pfnEndThread);
|
|
|
|
/**
|
|
* Create a thread.
|
|
*/
|
|
#define SDL_CreateThread(fn, name, data) SDL_CreateThread(fn, name, data, _beginthreadex, _endthreadex)
|
|
|
|
#else
|
|
|
|
/**
|
|
* Create a thread.
|
|
*
|
|
* Thread naming is a little complicated: Most systems have very small
|
|
* limits for the string length (BeOS has 32 bytes, Linux currently has 16,
|
|
* Visual C++ 6.0 has nine!), and possibly other arbitrary rules. You'll
|
|
* have to see what happens with your system's debugger. The name should be
|
|
* UTF-8 (but using the naming limits of C identifiers is a better bet).
|
|
* There are no requirements for thread naming conventions, so long as the
|
|
* string is null-terminated UTF-8, but these guidelines are helpful in
|
|
* choosing a name:
|
|
*
|
|
* http://stackoverflow.com/questions/149932/naming-conventions-for-threads
|
|
*
|
|
* If a system imposes requirements, SDL will try to munge the string for
|
|
* it (truncate, etc), but the original string contents will be available
|
|
* from SDL_GetThreadName().
|
|
*/
|
|
extern DECLSPEC SDL_Thread *SDLCALL
|
|
SDL_CreateThread(SDL_ThreadFunction fn, const char *name, void *data);
|
|
|
|
#endif
|
|
|
|
/**
|
|
* Get the thread name, as it was specified in SDL_CreateThread().
|
|
* This function returns a pointer to a UTF-8 string that names the
|
|
* specified thread, or NULL if it doesn't have a name. This is internal
|
|
* memory, not to be free()'d by the caller, and remains valid until the
|
|
* specified thread is cleaned up by SDL_WaitThread().
|
|
*/
|
|
extern DECLSPEC const char *SDLCALL SDL_GetThreadName(SDL_Thread *thread);
|
|
|
|
/**
|
|
* Get the thread identifier for the current thread.
|
|
*/
|
|
extern DECLSPEC SDL_threadID SDLCALL SDL_ThreadID(void);
|
|
|
|
/**
|
|
* Get the thread identifier for the specified thread.
|
|
*
|
|
* Equivalent to SDL_ThreadID() if the specified thread is NULL.
|
|
*/
|
|
extern DECLSPEC SDL_threadID SDLCALL SDL_GetThreadID(SDL_Thread * thread);
|
|
|
|
/**
|
|
* Set the priority for the current thread
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SetThreadPriority(SDL_ThreadPriority priority);
|
|
|
|
/**
|
|
* Wait for a thread to finish.
|
|
*
|
|
* The return code for the thread function is placed in the area
|
|
* pointed to by \c status, if \c status is not NULL.
|
|
*/
|
|
extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread * thread, int *status);
|
|
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
/* *INDENT-OFF* */
|
|
}
|
|
/* *INDENT-ON* */
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* _SDL_thread_h */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|