94 lines
3 KiB
C
94 lines
3 KiB
C
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#ifndef Py_PYTHREAD_H
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#define Py_PYTHREAD_H
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typedef void *PyThread_type_lock;
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typedef void *PyThread_type_sema;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Return status codes for Python lock acquisition. Chosen for maximum
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* backwards compatibility, ie failure -> 0, success -> 1. */
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typedef enum PyLockStatus {
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PY_LOCK_FAILURE = 0,
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PY_LOCK_ACQUIRED = 1,
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PY_LOCK_INTR
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} PyLockStatus;
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PyAPI_FUNC(void) PyThread_init_thread(void);
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PyAPI_FUNC(long) PyThread_start_new_thread(void (*)(void *), void *);
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PyAPI_FUNC(void) PyThread_exit_thread(void);
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PyAPI_FUNC(long) PyThread_get_thread_ident(void);
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PyAPI_FUNC(PyThread_type_lock) PyThread_allocate_lock(void);
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PyAPI_FUNC(void) PyThread_free_lock(PyThread_type_lock);
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PyAPI_FUNC(int) PyThread_acquire_lock(PyThread_type_lock, int);
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#define WAIT_LOCK 1
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#define NOWAIT_LOCK 0
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/* PY_TIMEOUT_T is the integral type used to specify timeouts when waiting
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on a lock (see PyThread_acquire_lock_timed() below).
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PY_TIMEOUT_MAX is the highest usable value (in microseconds) of that
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type, and depends on the system threading API.
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NOTE: this isn't the same value as `_thread.TIMEOUT_MAX`. The _thread
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module exposes a higher-level API, with timeouts expressed in seconds
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and floating-point numbers allowed.
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*/
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#if defined(HAVE_LONG_LONG)
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#define PY_TIMEOUT_T PY_LONG_LONG
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#define PY_TIMEOUT_MAX PY_LLONG_MAX
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#else
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#define PY_TIMEOUT_T long
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#define PY_TIMEOUT_MAX LONG_MAX
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#endif
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/* In the NT API, the timeout is a DWORD and is expressed in milliseconds */
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#if defined (NT_THREADS)
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#if (Py_LL(0xFFFFFFFF) * 1000 < PY_TIMEOUT_MAX)
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#undef PY_TIMEOUT_MAX
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#define PY_TIMEOUT_MAX (Py_LL(0xFFFFFFFF) * 1000)
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#endif
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#endif
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/* If microseconds == 0, the call is non-blocking: it returns immediately
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even when the lock can't be acquired.
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If microseconds > 0, the call waits up to the specified duration.
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If microseconds < 0, the call waits until success (or abnormal failure)
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microseconds must be less than PY_TIMEOUT_MAX. Behaviour otherwise is
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undefined.
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If intr_flag is true and the acquire is interrupted by a signal, then the
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call will return PY_LOCK_INTR. The caller may reattempt to acquire the
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lock.
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*/
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PyAPI_FUNC(PyLockStatus) PyThread_acquire_lock_timed(PyThread_type_lock,
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PY_TIMEOUT_T microseconds,
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int intr_flag);
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PyAPI_FUNC(void) PyThread_release_lock(PyThread_type_lock);
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PyAPI_FUNC(size_t) PyThread_get_stacksize(void);
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PyAPI_FUNC(int) PyThread_set_stacksize(size_t);
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PyAPI_FUNC(PyObject*) PyThread_GetInfo(void);
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/* Thread Local Storage (TLS) API */
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PyAPI_FUNC(int) PyThread_create_key(void);
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PyAPI_FUNC(void) PyThread_delete_key(int);
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PyAPI_FUNC(int) PyThread_set_key_value(int, void *);
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PyAPI_FUNC(void *) PyThread_get_key_value(int);
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PyAPI_FUNC(void) PyThread_delete_key_value(int key);
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/* Cleanup after a fork */
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PyAPI_FUNC(void) PyThread_ReInitTLS(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_PYTHREAD_H */
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