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- /* $Id: mthreads.h,v 1.2 1998/02/04 08:53:44 poliwoda Exp poliwoda $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 2.6
- * Copyright (C) 1995-1998 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- /*
- * mthreads.h -- platform dependent thread support for Mesa
- *
- * $Log$
- *
- * Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu)
- * and Christoph Poliwoda (poliwoda@volumegraphics.com)
- */
-
-
- /*
- * If this file is accidentally included by a non-threaded build,
- * it should not cause the build to fail, or otherwise cause problems.
- * In general, it should only be included when needed however.
- */
- #ifdef THREADS
- /*
- * It is an error not to select a specific threads API when compiling.
- */
- #if !defined PTHREADS && !defined SOLARIS_THREADS && !defined WIN32
- #error One of PTHREADS, SOLARIS_THREADS or WIN32 must be defined.
- #endif
-
-
- /*
- * Error messages which should be printed when our Mesa thread APIs fail
- * for one reason or another.
- */
- #define MESA_INIT_TSD_ERROR "Mesa: thread failed to allocate key for thread specific data"
- #define MESA_GET_TSD_ERROR "Mesa: thread failed to get thread specific data"
- #define MESA_SET_TSD_ERROR "Mesa: thread failed to set thread specific data"
-
-
- /*
- * magic number for win32 and solaris threads equivalents of pthread_once
- * This could probably be done better, but we haven't figured out how yet.
- */
- #define INITFUNC_CALLED_MAGIC 0xff8adc98
-
-
-
-
- /*
- * POSIX threads. This should be your choice in the Unix world
- * whenever possible. When building with POSIX threads, be sure
- * to any able any compiler flags which will cause the MT-safe
- * libc (if one exists) to be used when linking, as well as any
- * header macros for MT-safe errno, etc. For Solaris, this is the -mt
- * compiler flag. On Solaris with gcc, use -D_REENTRANT to enable
- * proper compiling for MT-safe libc etc.
- */
- #ifdef PTHREADS
- #include <pthread.h> /* POSIX threads headers */
-
- typedef struct {
- pthread_key_t key;
- pthread_once_t once;
- } MesaTSD;
-
- typedef pthread_mutex_t MesaMutex;
- typedef pthread_t MesaThread;
-
- #endif /* PTHREADS */
-
-
-
-
- /*
- * Solaris threads. Use only up to Solaris 2.4.
- * Solaris 2.5 and higher provide POSIX threads.
- * Be sure to compile with -mt on the Solaris compilers, or
- * use -D_REENTRANT if using gcc.
- */
- #ifdef SOLARIS_THREADS
- #include <thread.h>
-
- typedef struct {
- thread_key_t key;
- mutex_t keylock;
- int initfuncCalled;
- } MesaTSD;
-
- typedef mutex_t MesaMutex;
- typedef thread_t MesaThread;
-
- #endif /* SOLARIS_THREADS */
-
-
-
-
- /*
- * Windows threads. Should work with Windows NT and 95.
- * IMPORTANT: Link with multithreaded runtime library when THREADS are
- * used!
- */
-
- #ifdef WIN32
- #include <windows.h>
-
- typedef struct {
- DWORD key;
- int initfuncCalled;
- } MesaTSD;
-
- typedef CRITICAL_SECTION MesaMutex;
- typedef HANDLE MesaThread;
-
- #endif /* WIN32 */
-
-
-
-
- /*
- * Platform independent thread specific data API.
- */
- void MesaInitTSD(MesaTSD *);
- void* MesaGetTSD (MesaTSD *);
- void MesaSetTSD (MesaTSD *, void *, void (*initfunc)(void));
-
-
- /*
- * The following APIs are preliminary. They may be needed in
- * future versions of Mesa.
- */
- #if 0
-
- /*
- * Platform independent mutual exclusion lock API.
- */
- void MesaInitMutex (MesaMutex *);
- void MesaDestroyMutex (MesaMutex *);
- void MesaLockMutex (MesaMutex *);
- void MesaUnlockMutex (MesaMutex *);
-
- /*
- * Platform independent thread management API.
- */
- MesaThread MesaCreateThread ((void*)(*)(void*), void*);
- void MesaJoinThread (MesaThread);
-
- #endif
-
- #endif /* THREADS */
-