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#ifndef Py_CPYTHON_PYTHREAD_H

# error "this header file must not be included directly"

#endif

// PY_TIMEOUT_MAX is the highest usable value (in microseconds) of PY_TIMEOUT_T

// type, and depends on the system threading API.

// NOTE: this isn't the same value as `_thread.TIMEOUT_MAX`. The _thread module

// exposes a higher-level API, with timeouts expressed in seconds and

// floating-point numbers allowed.

PyAPI_DATA(const long long) PY_TIMEOUT_MAX;

#define PYTHREAD_INVALID_THREAD_ID ((unsigned long)-1)

#ifdef HAVE_PTHREAD_H

/* Darwin needs pthread.h to know type name the pthread_key_t. */

# include <pthread.h>

# define NATIVE_TSS_KEY_T pthread_key_t

#elif defined(NT_THREADS)

/* In Windows, native TSS key type is DWORD,

but hardcode the unsigned long to avoid errors for include directive.

# define NATIVE_TSS_KEY_T unsigned long

#elif defined(HAVE_PTHREAD_STUBS)

# include "pthread_stubs.h"

# define NATIVE_TSS_KEY_T pthread_key_t

#else

# error "Require native threads. See https://bugs.python.org/issue31370"

#endif

/* When Py_LIMITED_API is not defined, the type layout of Py_tss_t is

exposed to allow static allocation in the API clients. Even in this case,

you must handle TSS keys through API functions due to compatibility.

struct _Py_tss_t {

int _is_initialized;

NATIVE_TSS_KEY_T _key;

};

#undef NATIVE_TSS_KEY_T

/* When static allocation, you must initialize with Py_tss_NEEDS_INIT. */

#define Py_tss_NEEDS_INIT {0}