cond.h File Reference

Lightweight condition variable library. More...

#include <ppu-types.h>
#include <lv2/mutex.h>

Go to the source code of this file.

Data Structures
struct	sys_lwcond
	Lightweight condition variable data structure. More...
struct	sys_lwcond_attr
	Lightweight condition variable attributes data structure. More...

Typedefs
typedef struct sys_lwcond	sys_lwcond_t
	Lightweight condition variable data structure.
typedef struct sys_lwcond_attr	sys_lwcond_attr_t
	Lightweight condition variable attributes data structure.

Functions
s32	sysLwCondCreate (sys_lwcond_t *lwcond, sys_lwmutex_t *lwmutex, sys_lwcond_attr_t *attr)
	Create a lightweight condition variable. More...
s32	sysLwCondDestroy (sys_lwcond_t *lwcond)
	Destroy a lightweight condition variable. More...
s32	sysLwCondWait (sys_lwcond_t *lwcond, u64 timeout_usec)
	Wait for a lightweight condition variable to be signaled. More...
s32	sysLwCondSignal (sys_lwcond_t *lwcond)
	Signal a lightweight condition variable. More...
s32	sysLwCondSignalTo (sys_lwcond_t *lwcond, sys_ppu_thread_t thr)
	Signal a lightweight condition variable to a specific PPU thread. More...
s32	sysLwCondSignalAll (sys_lwcond_t *lwcond)
	Signal a lightweight condition variable to all waiting PPU threads. More...

Detailed Description

Lightweight condition variable library.

Function Documentation

sysLwCondCreate()

s32 sysLwCondCreate	(	sys_lwcond_t *	lwcond,
		sys_lwmutex_t *	lwmutex,
		sys_lwcond_attr_t *	attr
	)

Create a lightweight condition variable.

Parameters

lwcond	Pointer to storage for the created lightweight condition variable.
lwmutex	Pointer to the associated lightweight mutex.
attr	Pointer to the attributes data structure.

Returns

zero if no error occured, nonzero otherwise.

sysLwCondDestroy()

s32 sysLwCondDestroy

(

sys_lwcond_t *

lwcond

)

Destroy a lightweight condition variable.

Parameters

lwcond

Pointer to the allocated lightweight condition variable.

Returns

zero if no error occured, nonzero otherwise.

sysLwCondSignal()

s32 sysLwCondSignal

(

sys_lwcond_t *

lwcond

)

Signal a lightweight condition variable.

Parameters

lwcond

Pointer to the allocated lightweight condition variable.

Returns

zero if no error occured, nonzero otherwise.

sysLwCondSignalAll()

s32 sysLwCondSignalAll

(

sys_lwcond_t *

lwcond

)

Signal a lightweight condition variable to all waiting PPU threads.

Parameters

lwcond

Pointer to the allocated lightweight condition variable.

Returns

zero if no error occured, nonzero otherwise.

sysLwCondSignalTo()

s32 sysLwCondSignalTo	(	sys_lwcond_t *	lwcond,
		sys_ppu_thread_t	thr
	)

Signal a lightweight condition variable to a specific PPU thread.

Parameters

lwcond	Pointer to the allocated lightweight condition variable.
thr	The PPU thread id.

Returns

zero if no error occured, nonzero otherwise.

sysLwCondWait()

s32 sysLwCondWait	(	sys_lwcond_t *	lwcond,
		u64	timeout_usec
	)

Wait for a lightweight condition variable to be signaled.

The associated lightweight mutex must have been previously locked by the calling thread. This function atomically unlocks the mutex and waits for the condition variable to be signaled. Before returning to the calling thread, this function re-acquires the mutex.

Parameters

lwcond	Pointer to the allocated lightweight condition variable.
timeout_usec	Timeout value in microseconds, or 0 if no timeout is used.

Returns

zero if the lightweight condition variable was signaled, nonzero in case of error or if a timeout occured.