C++ (Cpp) kgsl_ringbuffer_waitspaceの例

コード例 #1

ファイル: kgsl_ringbuffer.c プロジェクト: franjoweb/liquid_chocolate_ics_kernel

static unsigned int *kgsl_ringbuffer_allocspace(struct kgsl_ringbuffer *rb,
					     unsigned int numcmds)
{
	unsigned int	*ptr = NULL;
	int				status = 0;

	BUG_ON(numcmds >= rb->sizedwords);

	GSL_RB_GET_READPTR(rb, &rb->rptr);
	/* check for available space */
	if (rb->wptr >= rb->rptr) {
		/* wptr ahead or equal to rptr */
		/* reserve dwords for nop packet */
		if ((rb->wptr + numcmds) > (rb->sizedwords -
				GSL_RB_NOP_SIZEDWORDS))
			status = kgsl_ringbuffer_waitspace(rb, numcmds, 1);
	} else {
		/* wptr behind rptr */
		if ((rb->wptr + numcmds) >= rb->rptr)
			status  = kgsl_ringbuffer_waitspace(rb, numcmds, 0);
		/* check for remaining space */
		/* reserve dwords for nop packet */
		if ((rb->wptr + numcmds) > (rb->sizedwords -
				GSL_RB_NOP_SIZEDWORDS))
			status = kgsl_ringbuffer_waitspace(rb, numcmds, 1);
	}

	if (status == 0) {
		ptr = (unsigned int *)rb->buffer_desc.hostptr + rb->wptr;
		rb->wptr += numcmds;
	}

	return ptr;
}

コード例 #2

static unsigned int *kgsl_ringbuffer_allocspace(struct kgsl_ringbuffer *rb,
					     unsigned int numcmds)
{
	unsigned int	*ptr = NULL;
	int				status = 0;

	BUG_ON(numcmds >= rb->sizedwords);

	
	if (rb->wptr >= rb->rptr) {
		
		
		if ((rb->wptr + numcmds) > (rb->sizedwords -
				GSL_RB_NOP_SIZEDWORDS))
			status = kgsl_ringbuffer_waitspace(rb, numcmds, 1);
	} else {
		
		if ((rb->wptr + numcmds) >= rb->rptr)
			status  = kgsl_ringbuffer_waitspace(rb, numcmds, 0);
		
		
		if ((rb->wptr + numcmds) > (rb->sizedwords -
				GSL_RB_NOP_SIZEDWORDS))
			status = kgsl_ringbuffer_waitspace(rb, numcmds, 1);
	}

	if (status == 0) {
		ptr = (unsigned int *)rb->buffer_desc.hostptr + rb->wptr;
		rb->wptr += numcmds;
	}

	return ptr;
}