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New PyGILState_ API - implements pep 311, from patch 684256.

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Mark Hammond 2003-04-19 15:41:53 +00:00
parent e36b690087
commit 8d98d2cb95
10 changed files with 395 additions and 131 deletions
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108
Python/thread.c
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@ -137,3 +137,111 @@ void PyThread_init_thread(void)
#include "thread_foobar.h"
#endif
*/
#ifndef Py_HAVE_NATIVE_TLS
/* If the platform has not supplied a platform specific
TLS implementation, provide our own.
This code stolen from "thread_sgi.h", where it was the only
implementation of an existing Python TLS API.
*/
/*
* Per-thread data ("key") support.
*/
struct key {
struct key *next;
long id;
int key;
void *value;
};
static struct key *keyhead = NULL;
static int nkeys = 0;
static PyThread_type_lock keymutex = NULL;
static struct key *find_key(int key, void *value)
{
struct key *p;
long id = PyThread_get_thread_ident();
for (p = keyhead; p != NULL; p = p->next) {
if (p->id == id && p->key == key)
return p;
}
if (value == NULL)
return NULL;
p = (struct key *)malloc(sizeof(struct key));
if (p != NULL) {
p->id = id;
p->key = key;
p->value = value;
PyThread_acquire_lock(keymutex, 1);
p->next = keyhead;
keyhead = p;
PyThread_release_lock(keymutex);
}
return p;
}
int PyThread_create_key(void)
{
if (keymutex == NULL)
keymutex = PyThread_allocate_lock();
return ++nkeys;
}
void PyThread_delete_key(int key)
{
struct key *p, **q;
PyThread_acquire_lock(keymutex, 1);
q = &keyhead;
while ((p = *q) != NULL) {
if (p->key == key) {
*q = p->next;
free((void *)p);
/* NB This does *not* free p->value! */
}
else
q = &p->next;
}
PyThread_release_lock(keymutex);
}
int PyThread_set_key_value(int key, void *value)
{
struct key *p = find_key(key, value);
if (p == NULL)
return -1;
else
return 0;
}
void *PyThread_get_key_value(int key)
{
struct key *p = find_key(key, NULL);
if (p == NULL)
return NULL;
else
return p->value;
}
void PyThread_delete_key_value(int key)
{
long id = PyThread_get_thread_ident();
struct key *p, **q;
PyThread_acquire_lock(keymutex, 1);
q = &keyhead;
while ((p = *q) != NULL) {
if (p->key == key && p->id == id) {
*q = p->next;
free((void *)p);
/* NB This does *not* free p->value! */
break;
}
else
q = &p->next;
}
PyThread_release_lock(keymutex);
}
#endif /* Py_HAVE_NATIVE_TLS */