C++ (Cpp) alloc_static示例

示例#1

文件： memory.cpp 项目： Bonfi96/godot

void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {

	if (p_memory == NULL) {
		return alloc_static(p_bytes, p_pad_align);
	}

	uint8_t *mem = (uint8_t *)p_memory;

#ifdef DEBUG_ENABLED
	bool prepad = true;
#else
	bool prepad = p_pad_align;
#endif

	if (prepad) {
		mem -= PAD_ALIGN;
		uint64_t *s = (uint64_t *)mem;

#ifdef DEBUG_ENABLED
		if (p_bytes > *s) {
			atomic_add(&mem_usage, p_bytes - *s);
			atomic_exchange_if_greater(&max_usage, mem_usage);
		} else {
			atomic_sub(&mem_usage, *s - p_bytes);
		}
#endif

		if (p_bytes == 0) {
			free(mem);
			return NULL;
		} else {
			*s = p_bytes;

			mem = (uint8_t *)realloc(mem, p_bytes + PAD_ALIGN);
			ERR_FAIL_COND_V(!mem, NULL);

			s = (uint64_t *)mem;

			*s = p_bytes;

			return mem + PAD_ALIGN;
		}
	} else {

		mem = (uint8_t *)realloc(mem, p_bytes);

		ERR_FAIL_COND_V(mem == NULL && p_bytes > 0, NULL);

		return mem;
	}
}

示例#2

文件： memory.cpp 项目： Alex-doc/godot

void *Memory::realloc_static(void *p_memory, size_t p_bytes, bool p_pad_align) {

	if (p_memory == NULL) {
		return alloc_static(p_bytes, p_pad_align);
	}

	uint8_t *mem = (uint8_t *)p_memory;

#ifdef DEBUG_ENABLED
	bool prepad = true;
#else
	bool prepad = p_pad_align;
#endif

	if (prepad) {
		mem -= PAD_ALIGN;
		uint64_t *s = (uint64_t *)mem;

#ifdef DEBUG_ENABLED
		mem_usage -= *s;
		mem_usage += p_bytes;
#endif

		if (p_bytes == 0) {
			free(mem);
			return NULL;
		} else {
			*s = p_bytes;

			mem = (uint8_t *)realloc(mem, p_bytes + PAD_ALIGN);
			ERR_FAIL_COND_V(!mem, NULL);

			s = (uint64_t *)mem;

			*s = p_bytes;

			return mem + PAD_ALIGN;
		}
	} else {

		mem = (uint8_t *)realloc(mem, p_bytes);

		ERR_FAIL_COND_V(mem == NULL && p_bytes > 0, NULL);

		return mem;
	}
}