/* -------------------------- gl_thread_t datatype -------------------------- */
+/* This choice of gl_thread_t assumes that
+ pthread_equal (a, b) is equivalent to ((a) == (b)).
+ This is the case on all platforms in use in 2008. */
typedef pthread_t gl_thread_t;
# define glthread_create(THREADP, FUNC, ARG) \
(pthread_in_use () ? pthread_create (THREADP, NULL, FUNC, ARG) : ENOSYS)
/* -------------------------- gl_thread_t datatype -------------------------- */
-/* The gl_thread_t is the thread id, not the thread handle. If it were the
- thread handle, it would be hard to implement gl_thread_self()
- (since GetCurrentThread () returns a pseudo-handle,
- DuplicateHandle (GetCurrentThread ()) returns a handle that must be closed
- afterwards, and there is no function for quickly retrieving a thread handle
- from its id). */
-typedef DWORD gl_thread_t;
+/* The gl_thread_t is a pointer to a structure in memory.
+ Why not the thread handle? If it were the thread handle, it would be hard
+ to implement gl_thread_self() (since GetCurrentThread () returns a pseudo-
+ handle, DuplicateHandle (GetCurrentThread ()) returns a handle that must be
+ closed afterwards, and there is no function for quickly retrieving a thread
+ handle from its id).
+ Why not the thread id? I tried it. It did not work: Sometimes ids appeared
+ that did not belong to running threads, and glthread_join failed with ESRCH.
+ */
+typedef struct gl_thread_struct *gl_thread_t;
# define glthread_create(THREADP, FUNC, ARG) \
glthread_create_func (THREADP, FUNC, ARG)
# define glthread_sigmask(HOW, SET, OSET) \
# define glthread_join(THREAD, RETVALP) \
glthread_join_func (THREAD, RETVALP)
# define gl_thread_self() \
- GetCurrentThreadId ()
+ gl_thread_self_func ()
# define gl_thread_exit(RETVAL) \
gl_thread_exit_func (RETVAL)
# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
extern int glthread_create_func (gl_thread_t *threadp, void * (*func) (void *), void *arg);
extern int glthread_join_func (gl_thread_t thread, void **retvalp);
+extern gl_thread_t gl_thread_self_func (void);
extern int gl_thread_exit_func (void *retval);
# ifdef __cplusplus