le_mutex.h File Reference

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Macros
#define	LE_MUTEX_DECLARE_REF(refName)

Typedefs
typedef struct le_mutex *	le_mutex_Ref_t

Functions
le_mutex_Ref_t	le_mutex_CreateRecursive (const char *nameStr)
le_mutex_Ref_t	le_mutex_CreateNonRecursive (const char *nameStr)
void	le_mutex_Delete (le_mutex_Ref_t mutexRef)
void	le_mutex_Lock (le_mutex_Ref_t mutexRef)
le_result_t	le_mutex_TryLock (le_mutex_Ref_t mutexRef)
void	le_mutex_Unlock (le_mutex_Ref_t mutexRef)

Detailed Description

Legato Mutex API include file.

Copyright (C) Sierra Wireless Inc. Use of this work is subject to license.

Macro Definition Documentation

#define LE_MUTEX_DECLARE_REF

(

refName

)

Value:

static le_mutex_Ref_t refName; \
    static inline void Lock(void) { le_mutex_Lock(refName); } \
    static inline void Unlock(void) { le_mutex_Unlock(refName); }

Declare a static mutex reference variable and accessor functions.

This is handy when you need a single, file-scope mutex for use inside your module to protect other file-scope data structures from multi-threaded race conditions.

Adding the line

LE_MUTEX_DECLARE_REF(MyMutexRef);

near the top of your file will create a file-scope variable called "MyMutexRef" of type le_mutex_Ref_t and functions called "Lock" and "Unlock" that access that variable.

See c_mutex_locking_tips for more information.

Parameters

refName

Name of the mutex reference variable.

Returns

Nothing.

Typedef Documentation

typedef struct le_mutex* le_mutex_Ref_t

Reference to a Mutex object.

Function Documentation

le_mutex_Ref_t le_mutex_CreateNonRecursive

(

const char *

nameStr

)

Create a Normal, Non-Recursive mutex.

Returns

Returns a reference to the mutex.

Note

Terminates the process on failure, no need to check the return value for errors.

Parameters

[in]

nameStr

Name of the mutex

le_mutex_Ref_t le_mutex_CreateRecursive

(

const char *

nameStr

)

Create a Normal, Recursive mutex.

Returns

Returns a reference to the mutex.

Note

Terminates the process on failure, no need to check the return value for errors.

Parameters

[in]

nameStr

Name of the mutex

void le_mutex_Delete

(

le_mutex_Ref_t

mutexRef

)

Delete a mutex.

Returns

Nothing.

Parameters

[in]

mutexRef

Mutex reference

void le_mutex_Lock

(

le_mutex_Ref_t

mutexRef

)

Lock a mutex.

Returns

Nothing.

Parameters

[in]

mutexRef

Mutex reference

le_result_t le_mutex_TryLock

(

le_mutex_Ref_t

mutexRef

)

Try a lock on a mutex.

Locks a mutex, if no other thread holds it. Otherwise, returns without locking.

Returns

• LE_OK if mutex was locked.
• LE_WOULD_BLOCK if mutex was already held by someone else.

Parameters

[in]

mutexRef

Mutex reference

void le_mutex_Unlock

(

le_mutex_Ref_t

mutexRef

)

Unlock a mutex.

Returns

Nothing.

Parameters

[in]

mutexRef

Mutex reference