Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 369cbd744ed06b3e01fe7a2e6a86ea4d85250231 authored by Ezio Melotti on 13 February 2012, 18:36:55 UTC, committed by Ezio Melotti on 13 February 2012, 18:36:55 UTC
1 parent ef18737
Tip revision: 369cbd744ed06b3e01fe7a2e6a86ea4d85250231 authored by Ezio Melotti on 13 February 2012, 18:36:55 UTC
Fix an index, add more tests, avoid raising errors for unknown declarations, and clean up comments.
Fix an index, add more tests, avoid raising errors for unknown declarations, and clean up comments.
Tip revision: 369cbd7
thread_os2.h
/* This code implemented by cvale@netcom.com */
#define INCL_DOSPROCESS
#define INCL_DOSSEMAPHORES
#include "os2.h"
#include "limits.h"
#include "process.h"
#if defined(PYCC_GCC)
#include <sys/builtin.h>
#include <sys/fmutex.h>
#else
long PyThread_get_thread_ident(void);
#endif
/* default thread stack size of 64kB */
#if !defined(THREAD_STACK_SIZE)
#define THREAD_STACK_SIZE 0x10000
#endif
#define OS2_STACKSIZE(x) (x ? x : THREAD_STACK_SIZE)
/*
* Initialization of the C package, should not be needed.
*/
static void
PyThread__init_thread(void)
{
}
/*
* Thread support.
*/
long
PyThread_start_new_thread(void (*func)(void *), void *arg)
{
int thread_id;
thread_id = _beginthread(func,
NULL,
OS2_STACKSIZE(_pythread_stacksize),
arg);
if (thread_id == -1) {
dprintf(("_beginthread failed. return %ld\n", errno));
}
return thread_id;
}
long
PyThread_get_thread_ident(void)
{
#if !defined(PYCC_GCC)
PPIB pib;
PTIB tib;
#endif
if (!initialized)
PyThread_init_thread();
#if defined(PYCC_GCC)
return _gettid();
#else
DosGetInfoBlocks(&tib, &pib);
return tib->tib_ptib2->tib2_ultid;
#endif
}
void
PyThread_exit_thread(void)
{
dprintf(("%ld: PyThread_exit_thread called\n",
PyThread_get_thread_ident()));
if (!initialized)
exit(0);
_endthread();
}
/*
* Lock support. This is implemented with an event semaphore and critical
* sections to make it behave more like a posix mutex than its OS/2
* counterparts.
*/
typedef struct os2_lock_t {
int is_set;
HEV changed;
} *type_os2_lock;
PyThread_type_lock
PyThread_allocate_lock(void)
{
#if defined(PYCC_GCC)
_fmutex *sem = malloc(sizeof(_fmutex));
if (!initialized)
PyThread_init_thread();
dprintf(("%ld: PyThread_allocate_lock() -> %lx\n",
PyThread_get_thread_ident(),
(long)sem));
if (_fmutex_create(sem, 0)) {
free(sem);
sem = NULL;
}
return (PyThread_type_lock)sem;
#else
APIRET rc;
type_os2_lock lock = (type_os2_lock)malloc(sizeof(struct os2_lock_t));
dprintf(("PyThread_allocate_lock called\n"));
if (!initialized)
PyThread_init_thread();
lock->is_set = 0;
DosCreateEventSem(NULL, &lock->changed, 0, 0);
dprintf(("%ld: PyThread_allocate_lock() -> %p\n",
PyThread_get_thread_ident(),
lock->changed));
return (PyThread_type_lock)lock;
#endif
}
void
PyThread_free_lock(PyThread_type_lock aLock)
{
#if !defined(PYCC_GCC)
type_os2_lock lock = (type_os2_lock)aLock;
#endif
dprintf(("%ld: PyThread_free_lock(%p) called\n",
PyThread_get_thread_ident(),aLock));
#if defined(PYCC_GCC)
if (aLock) {
_fmutex_close((_fmutex *)aLock);
free((_fmutex *)aLock);
}
#else
DosCloseEventSem(lock->changed);
free(aLock);
#endif
}
/*
* Return 1 on success if the lock was acquired
*
* and 0 if the lock was not acquired.
*/
int
PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
{
#if !defined(PYCC_GCC)
int done = 0;
ULONG count;
PID pid = 0;
TID tid = 0;
type_os2_lock lock = (type_os2_lock)aLock;
#endif
dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n",
PyThread_get_thread_ident(),
aLock,
waitflag));
#if defined(PYCC_GCC)
/* always successful if the lock doesn't exist */
if (aLock &&
_fmutex_request((_fmutex *)aLock, waitflag ? 0 : _FMR_NOWAIT))
return 0;
#else
while (!done) {
/* if the lock is currently set, we have to wait for
* the state to change
*/
if (lock->is_set) {
if (!waitflag)
return 0;
DosWaitEventSem(lock->changed, SEM_INDEFINITE_WAIT);
}
/* enter a critical section and try to get the semaphore. If
* it is still locked, we will try again.
*/
if (DosEnterCritSec())
return 0;
if (!lock->is_set) {
lock->is_set = 1;
DosResetEventSem(lock->changed, &count);
done = 1;
}
DosExitCritSec();
}
#endif
return 1;
}
void
PyThread_release_lock(PyThread_type_lock aLock)
{
#if !defined(PYCC_GCC)
type_os2_lock lock = (type_os2_lock)aLock;
#endif
dprintf(("%ld: PyThread_release_lock(%p) called\n",
PyThread_get_thread_ident(),
aLock));
#if defined(PYCC_GCC)
if (aLock)
_fmutex_release((_fmutex *)aLock);
#else
if (!lock->is_set) {
dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n",
PyThread_get_thread_ident(),
aLock,
GetLastError()));
return;
}
if (DosEnterCritSec()) {
dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n",
PyThread_get_thread_ident(),
aLock,
GetLastError()));
return;
}
lock->is_set = 0;
DosPostEventSem(lock->changed);
DosExitCritSec();
#endif
}
/* minimum/maximum thread stack sizes supported */
#define THREAD_MIN_STACKSIZE 0x8000 /* 32kB */
#define THREAD_MAX_STACKSIZE 0x2000000 /* 32MB */
/* set the thread stack size.
* Return 0 if size is valid, -1 otherwise.
*/
static int
_pythread_os2_set_stacksize(size_t size)
{
/* set to default */
if (size == 0) {
_pythread_stacksize = 0;
return 0;
}
/* valid range? */
if (size >= THREAD_MIN_STACKSIZE && size < THREAD_MAX_STACKSIZE) {
_pythread_stacksize = size;
return 0;
}
return -1;
}
#define THREAD_SET_STACKSIZE(x) _pythread_os2_set_stacksize(x)
Computing file changes ...