1  #ifndef Py_CPYTHON_PYTHREAD_H
       2  #  error "this header file must not be included directly"
       3  #endif
       4  
       5  #define PYTHREAD_INVALID_THREAD_ID ((unsigned long)-1)
       6  
       7  #ifdef HAVE_FORK
       8  /* Private function to reinitialize a lock at fork in the child process.
       9     Reset the lock to the unlocked state.
      10     Return 0 on success, return -1 on error. */
      11  PyAPI_FUNC(int) _PyThread_at_fork_reinit(PyThread_type_lock *lock);
      12  #endif  /* HAVE_FORK */
      13  
      14  #ifdef HAVE_PTHREAD_H
      15      /* Darwin needs pthread.h to know type name the pthread_key_t. */
      16  #   include <pthread.h>
      17  #   define NATIVE_TSS_KEY_T     pthread_key_t
      18  #elif defined(NT_THREADS)
      19      /* In Windows, native TSS key type is DWORD,
      20         but hardcode the unsigned long to avoid errors for include directive.
      21      */
      22  #   define NATIVE_TSS_KEY_T     unsigned long
      23  #elif defined(HAVE_PTHREAD_STUBS)
      24  #   include "cpython/pthread_stubs.h"
      25  #   define NATIVE_TSS_KEY_T     pthread_key_t
      26  #else
      27  #   error "Require native threads. See https://bugs.python.org/issue31370"
      28  #endif
      29  
      30  /* When Py_LIMITED_API is not defined, the type layout of Py_tss_t is
      31     exposed to allow static allocation in the API clients.  Even in this case,
      32     you must handle TSS keys through API functions due to compatibility.
      33  */
      34  struct _Py_tss_t {
      35      int _is_initialized;
      36      NATIVE_TSS_KEY_T _key;
      37  };
      38  
      39  #undef NATIVE_TSS_KEY_T
      40  
      41  /* When static allocation, you must initialize with Py_tss_NEEDS_INIT. */
      42  #define Py_tss_NEEDS_INIT   {0}