Function rpmalloc_initialize_config

source/extern/rpmalloc.c:2767–2992

}

int
rpmalloc_initialize_config(const rpmalloc_config_t* config) {
	if (_rpmalloc_initialized) {
		rpmalloc_thread_initialize();
		return 0;
	}
	_rpmalloc_initialized = 1;

	if (config)
		memcpy(&_memory_config, config, sizeof(rpmalloc_config_t));
	else
		_rpmalloc_memset_const(&_memory_config, 0, sizeof(rpmalloc_config_t));

	if (!_memory_config.memory_map || !_memory_config.memory_unmap) {
		_memory_config.memory_map = _rpmalloc_mmap_os;
		_memory_config.memory_unmap = _rpmalloc_unmap_os;
	}

#if PLATFORM_WINDOWS
	SYSTEM_INFO system_info;
	memset(&system_info, 0, sizeof(system_info));
	GetSystemInfo(&system_info);
	_memory_map_granularity = system_info.dwAllocationGranularity;
#else
	_memory_map_granularity = (size_t)sysconf(_SC_PAGESIZE);
#endif

#if RPMALLOC_CONFIGURABLE
	_memory_page_size = _memory_config.page_size;
#else
	_memory_page_size = 0;
#endif
	_memory_huge_pages = 0;
	if (!_memory_page_size) {
#if PLATFORM_WINDOWS
		_memory_page_size = system_info.dwPageSize;
#else
		_memory_page_size = _memory_map_granularity;
		if (_memory_config.enable_huge_pages) {
#if defined(__linux__)
			size_t huge_page_size = 0;
			FILE* meminfo = fopen("/proc/meminfo", "r");
			if (meminfo) {
				char line[128];
				while (!huge_page_size && fgets(line, sizeof(line) - 1, meminfo)) {
					line[sizeof(line) - 1] = 0;
					if (strstr(line, "Hugepagesize:"))
						huge_page_size = (size_t)strtol(line + 13, 0, 10) * 1024;
				}
				fclose(meminfo);
			}
			if (huge_page_size) {
				_memory_huge_pages = 1;
				_memory_page_size = huge_page_size;
				_memory_map_granularity = huge_page_size;
			}
#elif defined(__FreeBSD__)
			int rc;