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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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#define PY_TIMEOUT_T long long

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#define PY_TIMEOUT_MAX PY_LLONG_MAX

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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 0xFFFFFFFFLL * 1000 < PY_TIMEOUT_MAX

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#undef PY_TIMEOUT_MAX

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#define PY_TIMEOUT_MAX (0xFFFFFFFFLL * 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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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000

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PyAPI_FUNC(PyObject*) PyThread_GetInfo(void);

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#endif

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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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