cython

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cdef extern from "pythread.h":
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    ctypedef void *PyThread_type_lock
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    ctypedef void *PyThread_type_sema
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    void PyThread_init_thread()
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    long PyThread_start_new_thread(void (*)(void *), void *)  # FIXME: legacy
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    #unsigned long PyThread_start_new_thread(void (*)(void *), void *)  # returned 'long' before Py3.7
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    void PyThread_exit_thread()
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    long PyThread_get_thread_ident()  # FIXME: legacy
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    #unsigned long PyThread_get_thread_ident()  # returned 'long' before Py3.7
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    PyThread_type_lock PyThread_allocate_lock()
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    void PyThread_free_lock(PyThread_type_lock)
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    int PyThread_acquire_lock(PyThread_type_lock, int mode) nogil
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    void PyThread_release_lock(PyThread_type_lock) nogil
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    enum:
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        # 'mode' in PyThread_acquire_lock()
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        WAIT_LOCK    #   1
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        NOWAIT_LOCK  #   0
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    ctypedef enum PyLockStatus:
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        # return values of PyThread_acquire_lock() in CPython 3.2+
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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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    size_t PyThread_get_stacksize()
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    int PyThread_set_stacksize(size_t)
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    # Thread Local Storage (TLS) API deprecated in CPython 3.7+
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    int PyThread_create_key()
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    void PyThread_delete_key(int)
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    int PyThread_set_key_value(int, void *)
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    void * PyThread_get_key_value(int)
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    void PyThread_delete_key_value(int key)
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    # Cleanup after a fork
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    void PyThread_ReInitTLS()
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    # Thread Specific Storage (TSS) API in CPython 3.7+ (also backported)
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    #ctypedef struct Py_tss_t: pass   # Cython built-in type
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    Py_tss_t Py_tss_NEEDS_INIT        # Not normally useful: Cython auto-initialises declared "Py_tss_t" variables.
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    Py_tss_t * PyThread_tss_alloc()
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    void PyThread_tss_free(Py_tss_t *key)
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    int PyThread_tss_is_created(Py_tss_t *key)
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    int PyThread_tss_create(Py_tss_t *key)
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    void PyThread_tss_delete(Py_tss_t *key)
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    int PyThread_tss_set(Py_tss_t *key, void *value)
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    void * PyThread_tss_get(Py_tss_t *key)
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