mirror of https://github.com/python/cpython.git
249 lines
7.4 KiB
C
249 lines
7.4 KiB
C
/***********************************************************
|
|
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 or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI 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>
|
|
#include <process.h>
|
|
|
|
long PyThread_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 PyThread__init_thread(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Thread support.
|
|
*/
|
|
int PyThread_start_new_thread(void (*func)(void *), void *arg)
|
|
{
|
|
long rv;
|
|
int success = 0;
|
|
|
|
dprintf(("%ld: PyThread_start_new_thread called\n", PyThread_get_thread_ident()));
|
|
if (!initialized)
|
|
PyThread_init_thread();
|
|
|
|
rv = _beginthread(func, 0, arg); /* use default stack size */
|
|
|
|
if (rv != -1) {
|
|
success = 1;
|
|
dprintf(("%ld: PyThread_start_new_thread succeeded: %ld\n", PyThread_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 PyThread_get_thread_ident(void)
|
|
{
|
|
if (!initialized)
|
|
PyThread_init_thread();
|
|
|
|
return GetCurrentThreadId();
|
|
}
|
|
|
|
static void do_PyThread_exit_thread(int no_cleanup)
|
|
{
|
|
dprintf(("%ld: PyThread_exit_thread called\n", PyThread_get_thread_ident()));
|
|
if (!initialized)
|
|
if (no_cleanup)
|
|
_exit(0);
|
|
else
|
|
exit(0);
|
|
_endthread();
|
|
}
|
|
|
|
void PyThread_exit_thread(void)
|
|
{
|
|
do_PyThread_exit_thread(0);
|
|
}
|
|
|
|
void PyThread__exit_thread(void)
|
|
{
|
|
do_PyThread_exit_thread(1);
|
|
}
|
|
|
|
#ifndef NO_EXIT_PROG
|
|
static void do_PyThread_exit_prog(int status, int no_cleanup)
|
|
{
|
|
dprintf(("PyThread_exit_prog(%d) called\n", status));
|
|
if (!initialized)
|
|
if (no_cleanup)
|
|
_exit(status);
|
|
else
|
|
exit(status);
|
|
}
|
|
|
|
void PyThread_exit_prog(int status)
|
|
{
|
|
do_PyThread_exit_prog(status, 0);
|
|
}
|
|
|
|
void PyThread__exit_prog _P1(int status)
|
|
{
|
|
do_PyThread_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.
|
|
*/
|
|
PyThread_type_lock PyThread_allocate_lock(void)
|
|
{
|
|
HANDLE aLock;
|
|
|
|
dprintf(("PyThread_allocate_lock called\n"));
|
|
if (!initialized)
|
|
PyThread_init_thread();
|
|
|
|
aLock = CreateSemaphore(NULL, /* Security attributes */
|
|
1, /* Initial value */
|
|
1, /* Maximum value */
|
|
NULL);
|
|
/* Name of semaphore */
|
|
|
|
dprintf(("%ld: PyThread_allocate_lock() -> %lx\n", PyThread_get_thread_ident(), (long)aLock));
|
|
|
|
return (PyThread_type_lock) aLock;
|
|
}
|
|
|
|
void PyThread_free_lock(PyThread_type_lock aLock)
|
|
{
|
|
dprintf(("%ld: PyThread_free_lock(%lx) called\n", PyThread_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 PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
|
|
{
|
|
int success = 1;
|
|
DWORD waitResult;
|
|
|
|
dprintf(("%ld: PyThread_acquire_lock(%lx, %d) called\n", PyThread_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: PyThread_acquire_lock(%lx, %d) -> %d\n", PyThread_get_thread_ident(),(long)aLock, waitflag, success));
|
|
|
|
return success;
|
|
}
|
|
|
|
void PyThread_release_lock(PyThread_type_lock aLock)
|
|
{
|
|
dprintf(("%ld: PyThread_release_lock(%lx) called\n", PyThread_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 PyThread_release_lock(%lx) error: %l\n", PyThread_get_thread_ident(), (long)aLock, GetLastError()));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Semaphore support.
|
|
*/
|
|
PyThread_type_sema PyThread_allocate_sema(int value)
|
|
{
|
|
HANDLE aSemaphore;
|
|
|
|
dprintf(("%ld: PyThread_allocate_sema called\n", PyThread_get_thread_ident()));
|
|
if (!initialized)
|
|
PyThread_init_thread();
|
|
|
|
aSemaphore = CreateSemaphore( NULL, /* Security attributes */
|
|
value, /* Initial value */
|
|
INT_MAX, /* Maximum value */
|
|
NULL); /* Name of semaphore */
|
|
|
|
dprintf(("%ld: PyThread_allocate_sema() -> %lx\n", PyThread_get_thread_ident(), (long)aSemaphore));
|
|
|
|
return (PyThread_type_sema) aSemaphore;
|
|
}
|
|
|
|
void PyThread_free_sema(PyThread_type_sema aSemaphore)
|
|
{
|
|
dprintf(("%ld: PyThread_free_sema(%lx) called\n", PyThread_get_thread_ident(), (long)aSemaphore));
|
|
|
|
CloseHandle((HANDLE) aSemaphore);
|
|
}
|
|
|
|
/*
|
|
XXX must do something about waitflag
|
|
*/
|
|
int PyThread_down_sema(PyThread_type_sema aSemaphore, int waitflag)
|
|
{
|
|
DWORD waitResult;
|
|
|
|
dprintf(("%ld: PyThread_down_sema(%lx) called\n", PyThread_get_thread_ident(), (long)aSemaphore));
|
|
|
|
waitResult = WaitForSingleObject( (HANDLE) aSemaphore, INFINITE);
|
|
|
|
dprintf(("%ld: PyThread_down_sema(%lx) return: %l\n", PyThread_get_thread_ident(),(long) aSemaphore, waitResult));
|
|
return 0;
|
|
}
|
|
|
|
void PyThread_up_sema(PyThread_type_sema aSemaphore)
|
|
{
|
|
ReleaseSemaphore(
|
|
(HANDLE) aSemaphore, /* Handle of semaphore */
|
|
1, /* increment count by one */
|
|
NULL); /* not interested in previous count */
|
|
|
|
dprintf(("%ld: PyThread_up_sema(%lx)\n", PyThread_get_thread_ident(), (long)aSemaphore));
|
|
}
|