recmutex.h File Reference

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Description

Mutual exclusion locking, header.

Definition in file recmutex.h.

#include "lib/error.h"
#include "lib/sectionlock.h"
#include "lib/lockerror.h"
#include "lib/mutex.h"
#include <pthread.h>
#include <nobug.h>

Classes
struct	lumiera_recmutex
	Recursive Mutex. More...

Typedefs
typedef lumiera_recmutex *	LumieraRecmutex

Macros
#define	LUMIERA_RECMUTEX_SECTION(nobugflag, mtx)
	Recursive Mutual exclusive section. More...
#define	LUMIERA_RECMUTEX_SECTION_CHAIN(nobugflag, mtx)
#define	LUMIERA_RECMUTEX_SECTION_UNLOCK   LUMIERA_SECTION_UNLOCK_(&lumiera_lock_section_)

Functions
LumieraRecmutex	lumiera_recmutex_destroy (LumieraRecmutex self, struct nobug_flag *flag, const struct nobug_context ctx)
	Destroy a recursive mutex variable. More...
LumieraRecmutex	lumiera_recmutex_init (LumieraRecmutex self, const char *purpose, struct nobug_flag *flag, const struct nobug_context ctx)
	Initialise a recursive mutex variable Initialises a 'recursive' mutex which might be locked by the same thread multiple times. More...
static LumieraRecmutex	lumiera_recmutex_lock (LumieraRecmutex self, struct nobug_flag *flag, struct nobug_resource_user **handle, const struct nobug_context ctx)
static LumieraRecmutex	lumiera_recmutex_timedlock (LumieraRecmutex self, const struct timespec *timeout, struct nobug_flag *flag, struct nobug_resource_user **handle, const struct nobug_context ctx)
static LumieraRecmutex	lumiera_recmutex_trylock (LumieraRecmutex self, struct nobug_flag *flag, struct nobug_resource_user **handle, const struct nobug_context ctx)
static void	lumiera_recmutex_unlock (LumieraRecmutex self, struct nobug_flag *flag, struct nobug_resource_user **handle, const struct nobug_context ctx)

Macro Definition Documentation

LUMIERA_RECMUTEX_SECTION

#define LUMIERA_RECMUTEX_SECTION	(		nobugflag,
			mtx
	)

Value:

for (lumiera_sectionlock NOBUG_CLEANUP(lumiera_sectionlock_ensureunlocked)    \
         lumiera_lock_section_ = {                                              \
         mtx, (lumiera_sectionlock_unlock_fn) lumiera_mutex_unlock              \
           NOBUG_ALPHA_COMMA(&NOBUG_FLAG(nobugflag)) NOBUG_ALPHA_COMMA_NULL};   \
       ({                                                                       \
         if (lumiera_lock_section_.lock)                                        \
           lumiera_lock_section_.lock =                                         \
             lumiera_recmutex_lock (mtx, &NOBUG_FLAG(nobugflag),                \
                                    &lumiera_lock_section_.rh, NOBUG_CONTEXT);  \
         lumiera_lock_section_.lock;                                            \
       });                                                                      \
       ({                                                                       \
         LUMIERA_RECMUTEX_SECTION_UNLOCK;                                       \
       }))

Recursive Mutual exclusive section.

Definition at line 32 of file recmutex.h.

Referenced by lumiera_interface_close(), and lumiera_plugin_register().

LUMIERA_RECMUTEX_SECTION_CHAIN

#define LUMIERA_RECMUTEX_SECTION_CHAIN	(		nobugflag,
			mtx
	)

Value:

for (lumiera_sectionlock *lumiera_lock_section_old_ = &lumiera_lock_section_,         \
         NOBUG_CLEANUP(lumiera_sectionlock_ensureunlocked) lumiera_lock_section_ = {    \
         mtx, (lumiera_sectionlock_unlock_fn) lumiera_mutex_unlock                      \
           NOBUG_ALPHA_COMMA(&NOBUG_FLAG(nobugflag)) NOBUG_ALPHA_COMMA_NULL};           \
       ({                                                                               \
         if (lumiera_lock_section_.lock)                                                \
           {                                                                            \
             REQUIRE (lumiera_lock_section_old_->lock, "section prematurely unlocked"); \
             lumiera_lock_section_.lock =                                               \
               lumiera_recmutex_lock (mtx, &NOBUG_FLAG(nobugflag),                      \
                                      lumiera_lock_section_.rh, NOBUG_CONTEXT);         \
             LUMIERA_SECTION_UNLOCK_(lumiera_lock_section_old_);                        \
           }                                                                            \
         lumiera_lock_section_.lock;                                                    \
       });                                                                              \
       ({                                                                               \
         LUMIERA_RECMUTEX_SECTION_UNLOCK;                                               \
       }))

Definition at line 49 of file recmutex.h.

Function Documentation

lumiera_recmutex_init()

LumieraRecmutex lumiera_recmutex_init	(	LumieraRecmutex	self,
		const char *	purpose,
		struct nobug_flag *	flag,
		const struct nobug_context	ctx
	)

Initialise a recursive mutex variable Initialises a 'recursive' mutex which might be locked by the same thread multiple times.

Parameters

self	is a pointer to the mutex to be initialised

Returns

self as given

Definition at line 32 of file recmutex.c.

lumiera_recmutex_destroy()

LumieraRecmutex lumiera_recmutex_destroy	(	LumieraRecmutex	self,
		struct nobug_flag *	flag,
		const struct nobug_context	ctx
	)

Destroy a recursive mutex variable.

Parameters

self	is a pointer to the mutex to be destroyed

Returns

self as given

Definition at line 53 of file recmutex.c.

References LUMIERA_DIE.