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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior permission.
-
- STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
- THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
- FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
- OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* This code implemented by Dag.Gruneau@elsa.preseco.comm.se */
-
- #include "windows.h"
- #include "limits.h"
-
- long get_thread_ident(void);
-
- /*
- * Change all headers to pure ANSI as no one will use K&R style on an
- * NT
- */
-
- /*
- * Initialization of the C package, should not be needed.
- */
- static void _init_thread(void)
- {
- }
-
- /*
- * Thread support.
- */
- int start_new_thread(void (*func)(void *), void *arg)
- {
- HANDLE aThread;
- DWORD aThreadId;
-
- int success = 0; /* init not needed when SOLARIS_THREADS and */
- /* C_THREADS implemented properly */
- dprintf(("%ld: start_new_thread called\n", get_thread_ident()));
- if (!initialized)
- init_thread();
-
- aThread = CreateThread(
- NULL, /* No security attributes */
- 0, /* use default stack size */
- (LPTHREAD_START_ROUTINE) func, /* thread function */
- (LPVOID) arg, /* argument to thread function */
- 0, /* use the default creation flags */
- &aThreadId); /* returns the thread identifier */
-
- if (aThread != NULL) {
- CloseHandle(aThread); /* We do not want to have any zombies hanging around */
- success = 1;
- dprintf(("%ld: start_new_thread succeeded: %ld\n", get_thread_ident(), aThreadId));
- }
-
- return success;
- }
-
- /*
- * Return the thread Id instead of an handle. The Id is said to uniquely identify the
- * thread in the system
- */
- long get_thread_ident(void)
- {
- if (!initialized)
- init_thread();
-
- return GetCurrentThreadId();
- }
-
- static void do_exit_thread(int no_cleanup)
- {
- dprintf(("%ld: exit_thread called\n", get_thread_ident()));
- if (!initialized)
- if (no_cleanup)
- _exit(0);
- else
- exit(0);
- ExitThread(0);
- }
-
- void exit_thread(void)
- {
- do_exit_thread(0);
- }
-
- void _exit_thread(void)
- {
- do_exit_thread(1);
- }
-
- #ifndef NO_EXIT_PROG
- static void do_exit_prog(int status, int no_cleanup)
- {
- dprintf(("exit_prog(%d) called\n", status));
- if (!initialized)
- if (no_cleanup)
- _exit(status);
- else
- exit(status);
- }
-
- void exit_prog(int status)
- {
- do_exit_prog(status, 0);
- }
-
- void _exit_prog _P1(int status)
- {
- do_exit_prog(status, 1);
- }
- #endif /* NO_EXIT_PROG */
-
- /*
- * Lock support. It has too be implemented as semaphores.
- * I [Dag] tried to implement it with mutex but I could find a way to
- * tell whether a thread already own the lock or not.
- */
- type_lock allocate_lock(void)
- {
- HANDLE aLock;
-
- dprintf(("allocate_lock called\n"));
- if (!initialized)
- init_thread();
-
- aLock = CreateSemaphore(NULL, /* Security attributes */
- 1, /* Initial value */
- 1, /* Maximum value */
- NULL);
- /* Name of semaphore */
-
- dprintf(("%ld: allocate_lock() -> %lx\n", get_thread_ident(), (long)aLock));
-
- return (type_lock) aLock;
- }
-
- void free_lock(type_lock aLock)
- {
- dprintf(("%ld: free_lock(%lx) called\n", get_thread_ident(),(long)aLock));
-
- CloseHandle((HANDLE) aLock);
- }
-
- /*
- * Return 1 on success if the lock was acquired
- *
- * and 0 if the lock was not acquired. This means a 0 is returned
- * if the lock has already been acquired by this thread!
- */
- int acquire_lock(type_lock aLock, int waitflag)
- {
- int success = 1;
- DWORD waitResult;
-
- dprintf(("%ld: acquire_lock(%lx, %d) called\n", get_thread_ident(),(long)aLock, waitflag));
-
- waitResult = WaitForSingleObject((HANDLE) aLock, (waitflag == 1 ? INFINITE : 0));
-
- if (waitResult != WAIT_OBJECT_0) {
- success = 0; /* We failed */
- }
-
- dprintf(("%ld: acquire_lock(%lx, %d) -> %d\n", get_thread_ident(),(long)aLock, waitflag, success));
-
- return success;
- }
-
- void release_lock(type_lock aLock)
- {
- dprintf(("%ld: release_lock(%lx) called\n", get_thread_ident(),(long)aLock));
-
- if (!ReleaseSemaphore(
- (HANDLE) aLock, /* Handle of semaphore */
- 1, /* increment count by one */
- NULL)) /* not interested in previous count */
- {
- dprintf(("%ld: Could not release_lock(%lx) error: %l\n", get_thread_ident(), (long)aLock, GetLastError()));
- }
- }
-
- /*
- * Semaphore support.
- */
- type_sema allocate_sema(int value)
- {
- HANDLE aSemaphore;
-
- dprintf(("%ld: allocate_sema called\n", get_thread_ident()));
- if (!initialized)
- init_thread();
-
- aSemaphore = CreateSemaphore( NULL, /* Security attributes */
- value, /* Initial value */
- INT_MAX, /* Maximum value */
- NULL); /* Name of semaphore */
-
- dprintf(("%ld: allocate_sema() -> %lx\n", get_thread_ident(), (long)aSemaphore));
-
- return (type_sema) aSemaphore;
- }
-
- void free_sema(type_sema aSemaphore)
- {
- dprintf(("%ld: free_sema(%lx) called\n", get_thread_ident(), (long)aSemaphore));
-
- CloseHandle((HANDLE) aSemaphore);
- }
-
- void down_sema(type_sema aSemaphore)
- {
- DWORD waitResult;
-
- dprintf(("%ld: down_sema(%lx) called\n", get_thread_ident(), (long)aSemaphore));
-
- waitResult = WaitForSingleObject( (HANDLE) aSemaphore, INFINITE);
-
- dprintf(("%ld: down_sema(%lx) return: %l\n", get_thread_ident(),(long) aSemaphore, waitResult));
- }
-
- void up_sema(type_sema aSemaphore)
- {
- ReleaseSemaphore(
- (HANDLE) aSemaphore, /* Handle of semaphore */
- 1, /* increment count by one */
- NULL); /* not interested in previous count */
-
- dprintf(("%ld: up_sema(%lx)\n", get_thread_ident(), (long)aSemaphore));
- }
-