--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Python/thread_atheos.h Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,300 @@
+/* Threading for AtheOS.
+ Based on thread_beos.h. */
+
+#include <atheos/threads.h>
+#include <atheos/semaphore.h>
+#include <atheos/atomic.h>
+#include <errno.h>
+#include <string.h>
+
+/* Missing decl from threads.h */
+extern int exit_thread(int);
+
+
+/* Undefine FASTLOCK to play with simple semaphores. */
+#define FASTLOCK
+
+
+#ifdef FASTLOCK
+
+/* Use an atomic counter and a semaphore for maximum speed. */
+typedef struct fastmutex {
+ sem_id sem;
+ atomic_t count;
+} fastmutex_t;
+
+
+static int fastmutex_create(const char *name, fastmutex_t * mutex);
+static int fastmutex_destroy(fastmutex_t * mutex);
+static int fastmutex_lock(fastmutex_t * mutex);
+static int fastmutex_timedlock(fastmutex_t * mutex, bigtime_t timeout);
+static int fastmutex_unlock(fastmutex_t * mutex);
+
+
+static int fastmutex_create(const char *name, fastmutex_t * mutex)
+{
+ mutex->count = 0;
+ mutex->sem = create_semaphore(name, 0, 0);
+ return (mutex->sem < 0) ? -1 : 0;
+}
+
+
+static int fastmutex_destroy(fastmutex_t * mutex)
+{
+ if (fastmutex_timedlock(mutex, 0) == 0 || errno == EWOULDBLOCK) {
+ return delete_semaphore(mutex->sem);
+ }
+ return 0;
+}
+
+
+static int fastmutex_lock(fastmutex_t * mutex)
+{
+ atomic_t prev = atomic_add(&mutex->count, 1);
+ if (prev > 0)
+ return lock_semaphore(mutex->sem);
+ return 0;
+}
+
+
+static int fastmutex_timedlock(fastmutex_t * mutex, bigtime_t timeout)
+{
+ atomic_t prev = atomic_add(&mutex->count, 1);
+ if (prev > 0)
+ return lock_semaphore_x(mutex->sem, 1, 0, timeout);
+ return 0;
+}
+
+
+static int fastmutex_unlock(fastmutex_t * mutex)
+{
+ atomic_t prev = atomic_add(&mutex->count, -1);
+ if (prev > 1)
+ return unlock_semaphore(mutex->sem);
+ return 0;
+}
+
+
+#endif /* FASTLOCK */
+
+
+/*
+ * Initialization.
+ *
+ */
+static void PyThread__init_thread(void)
+{
+ /* Do nothing. */
+ return;
+}
+
+
+/*
+ * Thread support.
+ *
+ */
+
+static atomic_t thread_count = 0;
+
+long PyThread_start_new_thread(void (*func) (void *), void *arg)
+{
+ status_t success = -1;
+ thread_id tid;
+ char name[OS_NAME_LENGTH];
+ atomic_t this_thread;
+
+ dprintf(("PyThread_start_new_thread called\n"));
+
+ this_thread = atomic_add(&thread_count, 1);
+ PyOS_snprintf(name, sizeof(name), "python thread (%d)", this_thread);
+
+ tid = spawn_thread(name, func, NORMAL_PRIORITY, 0, arg);
+ if (tid < 0) {
+ dprintf(("PyThread_start_new_thread spawn_thread failed: %s\n", strerror(errno)));
+ } else {
+ success = resume_thread(tid);
+ if (success < 0) {
+ dprintf(("PyThread_start_new_thread resume_thread failed: %s\n", strerror(errno)));
+ }
+ }
+
+ return (success < 0 ? -1 : tid);
+}
+
+
+long PyThread_get_thread_ident(void)
+{
+ return get_thread_id(NULL);
+}
+
+
+static void do_PyThread_exit_thread(int no_cleanup)
+{
+ dprintf(("PyThread_exit_thread called\n"));
+
+ /* Thread-safe way to read a variable without a mutex: */
+ if (atomic_add(&thread_count, 0) == 0) {
+ /* No threads around, so exit main(). */
+ if (no_cleanup)
+ _exit(0);
+ else
+ exit(0);
+ } else {
+ /* We're a thread */
+ exit_thread(0);
+ }
+}
+
+
+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));
+
+ /* No need to do anything, the threads get torn down if main()exits. */
+ if (no_cleanup)
+ _exit(status);
+ else
+ exit(status);
+}
+
+
+void PyThread_exit_prog(int status)
+{
+ do_PyThread_exit_prog(status, 0);
+}
+
+
+void PyThread__exit_prog(int status)
+{
+ do_PyThread_exit_prog(status, 1);
+}
+#endif /* NO_EXIT_PROG */
+
+
+/*
+ * Lock support.
+ *
+ */
+
+static atomic_t lock_count = 0;
+
+PyThread_type_lock PyThread_allocate_lock(void)
+{
+#ifdef FASTLOCK
+ fastmutex_t *lock;
+#else
+ sem_id sema;
+#endif
+ char name[OS_NAME_LENGTH];
+ atomic_t this_lock;
+
+ dprintf(("PyThread_allocate_lock called\n"));
+
+#ifdef FASTLOCK
+ lock = (fastmutex_t *) malloc(sizeof(fastmutex_t));
+ if (lock == NULL) {
+ dprintf(("PyThread_allocate_lock failed: out of memory\n"));
+ return (PyThread_type_lock) NULL;
+ }
+#endif
+ this_lock = atomic_add(&lock_count, 1);
+ PyOS_snprintf(name, sizeof(name), "python lock (%d)", this_lock);
+
+#ifdef FASTLOCK
+ if (fastmutex_create(name, lock) < 0) {
+ dprintf(("PyThread_allocate_lock failed: %s\n",
+ strerror(errno)));
+ free(lock);
+ lock = NULL;
+ }
+ dprintf(("PyThread_allocate_lock()-> %p\n", lock));
+ return (PyThread_type_lock) lock;
+#else
+ sema = create_semaphore(name, 1, 0);
+ if (sema < 0) {
+ dprintf(("PyThread_allocate_lock failed: %s\n",
+ strerror(errno)));
+ sema = 0;
+ }
+ dprintf(("PyThread_allocate_lock()-> %p\n", sema));
+ return (PyThread_type_lock) sema;
+#endif
+}
+
+
+void PyThread_free_lock(PyThread_type_lock lock)
+{
+ dprintf(("PyThread_free_lock(%p) called\n", lock));
+
+#ifdef FASTLOCK
+ if (fastmutex_destroy((fastmutex_t *) lock) < 0) {
+ dprintf(("PyThread_free_lock(%p) failed: %s\n", lock,
+ strerror(errno)));
+ }
+ free(lock);
+#else
+ if (delete_semaphore((sem_id) lock) < 0) {
+ dprintf(("PyThread_free_lock(%p) failed: %s\n", lock,
+ strerror(errno)));
+ }
+#endif
+}
+
+
+int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
+{
+ int retval;
+
+ dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock,
+ waitflag));
+
+#ifdef FASTLOCK
+ if (waitflag)
+ retval = fastmutex_lock((fastmutex_t *) lock);
+ else
+ retval = fastmutex_timedlock((fastmutex_t *) lock, 0);
+#else
+ if (waitflag)
+ retval = lock_semaphore((sem_id) lock);
+ else
+ retval = lock_semaphore_x((sem_id) lock, 1, 0, 0);
+#endif
+ if (retval < 0) {
+ dprintf(("PyThread_acquire_lock(%p, %d) failed: %s\n",
+ lock, waitflag, strerror(errno)));
+ }
+ dprintf(("PyThread_acquire_lock(%p, %d)-> %d\n", lock, waitflag,
+ retval));
+ return retval < 0 ? 0 : 1;
+}
+
+
+void PyThread_release_lock(PyThread_type_lock lock)
+{
+ dprintf(("PyThread_release_lock(%p) called\n", lock));
+
+#ifdef FASTLOCK
+ if (fastmutex_unlock((fastmutex_t *) lock) < 0) {
+ dprintf(("PyThread_release_lock(%p) failed: %s\n", lock,
+ strerror(errno)));
+ }
+#else
+ if (unlock_semaphore((sem_id) lock) < 0) {
+ dprintf(("PyThread_release_lock(%p) failed: %s\n", lock,
+ strerror(errno)));
+ }
+#endif
+}