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Move m_once_t to the public interface

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Patrick Pelissier committed 2022-03-19 16:44:40 +01:00
1 parent df79c306d9
commit 9fda06276c
2 files changed
+30 -17
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README.md
+15
View File
@@ -7076,6 +7076,21 @@ If the initialization fails, the program aborts.
Wait indefinitely for the thread 'thread' to exit.
#### m\_once\_t
A type representing a helper structure for m_once_call.
An object of type m\_once\_t shall be initialized at declaration level with M\_ONCE\_INIT\_VALUE
#### M\_ONCE\_INIT\_VALUE
Initial value to set an object of type m\_once\_t when declaring it.
#### void m\_once\_call(m\_once\_t obj, void (*func)(void))
Executes the function pointer func exactly once,
even if called concurrently, from several threads,
provided that they share the same object obj.
### M-WORKER
m-mutex.h
+15 -17
View File
@@ -152,14 +152,14 @@ static inline bool m_thread_sleep(unsigned long long usec)
return retval == 0;
}
// Internal type, not exported.
typedef once_flag m_once_ct[1];
// a helper structure for m_once_call
typedef once_flag m_once_t[1];
// Initial value for m_once_ct
#define M_ONCEI_INIT_VALUE { ONCE_FLAG_INIT }
// Initial value for m_once_t
#define M_ONCE_INIT_VALUE { ONCE_FLAG_INIT }
// Call the function exactly once
static inline void m_oncei_call(m_once_ct o, void (*func)(void))
static inline void m_once_call(m_once_t o, void (*func)(void))
{
call_once(o,func);
}
@@ -315,10 +315,9 @@ static inline bool m_thread_sleep(unsigned long long usec)
}
// Internal type, not exported.
typedef INIT_ONCE m_once_ct[1];
#define M_ONCEI_INIT_VALUE { INIT_ONCE_STATIC_INIT }
static inline BOOL CALLBACK m_oncei_callback( PINIT_ONCE InitOnce, PVOID Parameter, PVOID *lpContext)
typedef INIT_ONCE m_once_t[1];
#define M_ONCE_INIT_VALUE { INIT_ONCE_STATIC_INIT }
static inline BOOL CALLBACK m_once_callback( PINIT_ONCE InitOnce, PVOID Parameter, PVOID *lpContext)
{
void (*func)(void);
(void) InitOnce;
@@ -327,9 +326,9 @@ static inline BOOL CALLBACK m_oncei_callback( PINIT_ONCE InitOnce, PVOID Paramet
(*func)();
return TRUE;
}
static inline void m_oncei_call(m_once_ct o, void (*func)(void))
static inline void m_once_call(m_once_t o, void (*func)(void))
{
InitOnceExecuteOnce(o, m_oncei_callback, (void*)(intptr_t)func, NULL);
InitOnceExecuteOnce(o, m_once_callback, (void*)(intptr_t)func, NULL);
}
#if defined(_MSC_VER)
@@ -474,10 +473,9 @@ static inline bool m_thread_sleep(unsigned long long usec)
return retval == 0;
}
// Internal type, not exported.
typedef pthread_once_t m_once_ct[1];
#define M_ONCEI_INIT_VALUE { PTHREAD_ONCE_INIT }
static inline void m_oncei_call(m_once_ct o, void (*func)(void))
typedef pthread_once_t m_once_t[1];
#define M_ONCE_INIT_VALUE { PTHREAD_ONCE_INIT }
static inline void m_once_call(m_once_t o, void (*func)(void))
{
pthread_once(o,func);
}
@@ -511,9 +509,9 @@ M_END_PROTECTED_CODE
static void M_C(m_mutex_init_, name)(void) { \
m_mutex_init(name); \
} \
m_once_ct M_C(m_once_, name) = M_ONCEI_INIT_VALUE
m_once_t M_C(m_once_, name) = M_ONCE_INIT_VALUE
# define M_LOCKI_BY_ONCE(name) \
(m_oncei_call(M_C(m_once_, name), M_C(m_mutex_init_, name)), \
(m_once_call(M_C(m_once_, name), M_C(m_mutex_init_, name)), \
m_mutex_lock(name), (void) 0 )
# define M_LOCK(name) \
M_LOCKI_DO(name, M_C(local_cont_, __LINE__), M_LOCKI_BY_ONCE, m_mutex_unlock)