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* null-threads.h: Implement pthread-like API as a set of macros.

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This commit is contained in:
Marius Vollmer 2002-12-02 00:59:27 +00:00
parent 340c49bf2c
commit d035029382
1 changed files with 89 additions and 8 deletions
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97
libguile/null-threads.h
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@ -1,7 +1,7 @@
/* classes: h_files */
#ifndef SCM_NULL_DEFS_H
#define SCM_NULL_DEFS_H
#ifndef SCM_NULL_THREADS_H
#define SCM_NULL_THREADS_H
/* Copyright (C) 2002 Free Software Foundation, Inc.
*
@ -50,16 +50,97 @@
no new threads can be created.
*/
#define SCM_CRITICAL_SECTION_START
#define SCM_CRITICAL_SECTION_END
/* We can't switch so don't bother trying.
*/
#undef SCM_THREAD_SWITCHING_CODE
#define SCM_THREAD_SWITCHING_CODE
SCM_API void *scm_null_threads_data;
#define scm_t_thread int
#define SCM_THREAD_LOCAL_DATA (scm_null_threads_data)
#define SCM_SET_THREAD_LOCAL_DATA(ptr) (scm_null_threads_data = (ptr))
/* The "(void)(...)" constructs in the expansions are there to ensure
that the side effects of the argument expressions take place.
*/
#endif /* SCM_NULL_DEFS_H */
#define scm_thread_create(th,proc,data) ((void)(proc), (void)(data), ENOTSUP)
#define scm_thread_join(th) do { (void)(th); abort(); } while(0)
#define scm_thread_detach(th) do { (void)(th); abort(); } while(0)
#define scm_thread_self() 0
#define scm_t_mutex int
#define scm_mutex_init(mx) do { (void)(mx); } while(0)
#define scm_mutex_destroy(mx) do { (void)(mx); } while(0)
#define scm_mutex_lock(mx) do { (void)(mx); } while(0)
#define scm_mutex_trylock(mx) ((void)(mx), 1)
#define scm_mutex_unlock(mx) do { (void)(mx); } while(0)
#define scm_t_cond int
#define scm_cond_init(cv) do { (void)(cv); } while(0)
#define scm_cond_destroy(cv) do { (void)(cv); } while(0)
#define scm_cond_wait(cv,mx) ((void)(cv), (void)(mx), ENOTSUP)
#define scm_cond_timedwait(cv,mx,at) ((void)(cv), (void)(mx), (void)(at), \
ENOTSUP)
#define scm_cond_signal(cv) do { (void)(cv); } while(0)
#define scm_cond_broadcast(cv) do { (void)(cv); } while(0)
#define scm_thread_select select
typedef void **scm_t_key;
#define scm_key_create(keyp) do { *(keyp) = malloc(sizeof(void*)); \
} while(0)
#define scm_key_delete(key) do { free(key); } while(0)
#define scm_key_setspecific(key, value) do { *(key) = (value); } while(0)
#define scm_key_getspecific(key) *(key)
#if 0
/* These are the actual prototypes of the functions/macros defined
above. We list them here for reference. */
typedef int scm_t_thread;
SCM_API int scm_thread_create (scm_t_thread *th,
void (*proc) (void *), void *data);
SCM_API void scm_thread_join (scm_t_thread th);
SCM_API void scm_thread_detach (scm_t_thread th);
SCM_API scm_t_thread scm_thread_self (void);
typedef int scm_t_mutex;
SCM_API void scm_mutex_init (scm_t_mutex *mx);
SCM_API void scm_mutex_destroy (scm_t_mutex *mx);
SCM_API void scm_mutex_lock (scm_t_mutex *mx);
SCM_API int scm_mutex_trylock (scm_t_mutex *mx);
SCM_API void scm_mutex_unlock (scm_t_mutex *mx);
typedef int scm_t_cond;
SCM_API void scm_cond_init (scm_t_cond *cv);
SCM_API void scm_cond_destroy (scm_t_cond *cv);
SCM_API void scm_cond_wait (scm_t_cond *cv, scm_t_mutex *mx);
SCM_API int scm_cond_timedwait (scm_t_cond *cv, scm_t_mutex *mx,
struct timespec *abstime);
SCM_API void scm_cond_signal (scm_t_cond *cv);
SCM_API void scm_cond_broadcast (scm_t_cond *cv);
typedef int scm_t_key;
SCM_API void scm_key_create (scm_t_key *keyp);
SCM_API void scm_key_delete (scm_t_key key);
SCM_API void scm_key_setspecific (scm_t_key key, const void *value);
SCM_API void *scm_key_getspecific (scm_t_key key);
SCM_API int scm_thread_select (int nfds,
SELECT_TYPE *readfds,
SELECT_TYPE *writefds,
SELECT_TYPE *exceptfds,
struct timeval *timeout);
#endif
#endif /* SCM_NULL_THREADS_H */
/*
Local Variables: