C++ (Cpp) RT_SHM_OP_PERM Examples

Example #1

File: shm.c Project: Enextuse/RTAI

static inline void *_rt_shm_alloc(unsigned long name, int size, int suprt)
{
	void *adr;

//	suprt = USE_GFP_ATOMIC; // to force some testing
	if (!(adr = rt_get_adr_cnt(name)) && size > 0 && suprt >= 0 && RT_SHM_OP_PERM())
	{
		size = ((size - 1) & PAGE_MASK) + PAGE_SIZE;
		if ((adr = suprt ? rkmalloc(&size, SUPRT[suprt]) : rvmalloc(size)))
		{
			if (!rt_register(name, adr, suprt ? -size : size, 0))
			{
				if (suprt)
				{
					rkfree(adr, size);
				}
				else
				{
					rvfree(adr, size);
				}
				return 0;
			}
			memset(ALIGN2PAGE(adr), 0, size);
		}
	}
	return ALIGN2PAGE(adr);
}

Example #2

static inline int _rt_shm_free(unsigned long name, int size)
{
	void *adr;

	if (size && (adr = rt_get_adr(name))) {
		if (RT_SHM_OP_PERM()) {
			if (!rt_drg_on_name_cnt(name) && name != GLOBAL_HEAP_ID) {
				if (size < 0) {
					rkfree(adr, -size);
				} else {
					rvfree(adr, size);
				}
			}
		}
		return abs(size);
	}
	return 0;
}