Tizen(Headed) Native API  6.5
Functions | Typedefs | Defines
Thread
Tools

Abstracts platform threads, providing a uniform API. It's modeled after POSIX THREADS (pthreads), on Linux they are almost 1:1 mapping.

See also:
Eina_Lock_Group for mutex/locking abstraction.
Since (EFL) :
1.8

Functions

Eina_Thread eina_thread_self (void)
 Returns identifier of the current thread.
Eina_Bool eina_thread_equal (Eina_Thread t1, Eina_Thread t2)
 Checks if two thread identifiers are the same.
Eina_Bool eina_thread_create (Eina_Thread *t, Eina_Thread_Priority prio, int affinity, Eina_Thread_Cb func, const void *data)
 Creates a new thread, setting its priority and affinity.
void * eina_thread_join (Eina_Thread t)
 Joins a currently running thread, waiting until it finishes.
Eina_Bool eina_thread_name_set (Eina_Thread t, const char *name)
 Sets the name of a given thread for debugging purposes.

Typedefs

typedef uintptr_t Eina_Thread
typedef void *(* Eina_Thread_Cb )(void *data, Eina_Thread t)
typedef enum _Eina_Thread_Priority Eina_Thread_Priority
typedef void *(* Eina_Thread_Cancellable_Run_Cb )(void *data)

Defines

#define EINA_THREAD_CLEANUP_PUSH(cleanup, data)   pthread_cleanup_push(cleanup, data)
 Pushes a cleanup function to be executed when the thread is canceled.
#define EINA_THREAD_CLEANUP_POP(exec_cleanup)   pthread_cleanup_pop(exec_cleanup)
 Pops a cleanup function to be executed when the thread is canceled.

Define Documentation

#define EINA_THREAD_CLEANUP_POP (   exec_cleanup)    pthread_cleanup_pop(exec_cleanup)

Pops a cleanup function to be executed when the thread is canceled.

This macro will remove a previously pushed cleanup function, thus if the thread is canceled with eina_thread_cancel() and the thread was previously marked as cancellable with eina_thread_cancellable_set(), that cleanup won't be executed anymore.

It must be paired with EINA_THREAD_CLEANUP_PUSH() in the same code block as they will expand to do {} while ()!

Note:
If the block within EINA_THREAD_CLEANUP_PUSH() and EINA_THREAD_CLEANUP_POP() returns, the cleanup callback will not be executed even if exec_cleanup is EINA_TRUE! To avoid problems prefer to use eina_thread_cancellable_run()!
Parameters:
[in]exec_cleanupif EINA_TRUE, the function registered with EINA_THREAD_CLEANUP_PUSH() will be executed.
See also:
eina_thread_cancellable_run()
Since (EFL) :
1.19
#define EINA_THREAD_CLEANUP_PUSH (   cleanup,
  data 
)    pthread_cleanup_push(cleanup, data)

Pushes a cleanup function to be executed when the thread is canceled.

This macro will schedule a function cleanup(data) to be executed if the thread is canceled with eina_thread_cancel() and the thread was previously marked as cancellable with eina_thread_cancellable_set().

It must be paired with EINA_THREAD_CLEANUP_POP() in the same code block as they will expand to do {} while ()!

The cleanup function may also be executed if EINA_THREAD_CLEANUP_POP(EINA_TRUE) is used.

Note:
If the block within EINA_THREAD_CLEANUP_PUSH() and EINA_THREAD_CLEANUP_POP() returns, the cleanup callback will not be executed! To avoid problems prefer to use eina_thread_cancellable_run()!
Parameters:
[in]cleanupThe function to execute on cancellation.
[in]dataThe context to give to cleanup function.
See also:
eina_thread_cancellable_run()
Since (EFL) :
1.19

Typedef Documentation

Eina_Thread

Type for a generic thread.

Eina_Thread_Cancellable_Run_Cb

Type for the definition of a cancellable callback to run.

Since (EFL) :
1.19
Eina_Thread_Cb

Type for the definition of a thread callback function

Eina_Thread_Priority

Type to enumerate different thread priorities

Enumeration Type Documentation

enum _Eina_Thread_Priority
Enumerator:
EINA_THREAD_URGENT 

Higher than average process priority

EINA_THREAD_NORMAL 

Standard process priority

EINA_THREAD_BACKGROUND 

Lower than average process priority

EINA_THREAD_IDLE 

Thread to be executed only when the processor is idle

Function Documentation

Eina_Bool eina_thread_create ( Eina_Thread *  t,
Eina_Thread_Priority  prio,
int  affinity,
Eina_Thread_Cb  func,
const void *  data 
)

Creates a new thread, setting its priority and affinity.

Parameters:
[out]twhere to return the thread identifier. Must not be NULL.
[in]priothread priority to use, usually EINA_THREAD_BACKGROUND
[in]affinitythread affinity to use. To not set affinity use -1.
[in]funcfunction to run in the thread. Must not be NULL.
[in]datacontext data to provide to func as first argument.
Returns:
EINA_TRUE if thread was created, EINA_FALSE on errors.
Since (EFL) :
1.8
Since :
3.0
Eina_Bool eina_thread_equal ( Eina_Thread  t1,
Eina_Thread  t2 
)

Checks if two thread identifiers are the same.

Parameters:
[in]t1first thread identifier to compare.
[in]t2second thread identifier to compare.
Returns:
EINA_TRUE if they are equal, EINA_FALSE otherwise.
Since (EFL) :
1.8
Since :
3.0
void* eina_thread_join ( Eina_Thread  t)

Joins a currently running thread, waiting until it finishes.

This function will block the current thread until t finishes. The returned value is the one returned by t func() and may be NULL on errors. See Error to identify problems.

Parameters:
[in]tthread identifier to wait.
Returns:
value returned by t creation function func() or NULL on errors. Check error with Error. If the thread was canceled, it will return EINA_THREAD_JOIN_CANCELED.
Since (EFL) :
1.8
Since :
3.0
Eina_Bool eina_thread_name_set ( Eina_Thread  t,
const char *  name 
)

Sets the name of a given thread for debugging purposes.

This maps to the pthread_setname_np() GNU extension or similar if available. The name may be limited in size (possibly 16 characters including the null byte terminator). This is useful for debugging to name a thread so external tools can display a meaningful name attached to the thread.

Parameters:
[in]tthread to set the name of
[in]namea string to name the thread - this cannot be NULL
Returns:
EINA_TRUE if it succeeds in setting the name or EINA_FALSE otherwise.
Since (EFL) :
1.16
Since :
3.0
Eina_Thread eina_thread_self ( void  )

Returns identifier of the current thread.

Returns:
identifier of current thread.
Since (EFL) :
1.8
Since :
3.0

Variable Documentation

const void* EINA_THREAD_JOIN_CANCELED

The return value of eina_thread_join() if it was canceled with eina_thread_cancel().

A thread must be explicitly flagged as cancellable with eina_thread_cancellable_set(), by default it's not and this value shouldn't be returned.

See also:
eina_thread_join()
Since (EFL) :
1.19