Add support to Windows NUMA core count

librz/util/thread_pool.c

@@ -14,16 +14,78 @@ struct rz_th_pool_t {
  RzThread **threads;
 };
 
+#ifdef __WINDOWS__
+/// defines the GetLogicalProcessorInformationEx function
+typedef BOOL (*WINAPI glpie_t)(
+ LOGICAL_PROCESSOR_RELATIONSHIP,
+ PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX,
+ PDWORD);
+
+// Classic way to get number of cores in windows.
+static size_t get_windows_compatible_n_cores() {
+ SYSTEM_INFO sysinfo;
+ GetSystemInfo(&sysinfo);
+ return sysinfo.dwNumberOfProcessors;
+}
+
+/*
+ * Windows NUMA support is particular
+ * https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getlogicalprocessorinformationex#remarks
+ *
+ * New api here:
+ * https://learn.microsoft.com/en-us/windows/win32/procthread/numa-support
+ */
+static size_t get_windows_numa_n_cores() {
+ ut8 *buffer = NULL;
+ size_t n_cores = 0;
+ DWORD length = 0;
+ HMODULE kernel32 = GetModuleHandleW(L"kernel32.dll");
+
+ glpie_t GetLogicalProcessorInformationEx = (glpie_t)GetProcAddress(kernel32, "GetLogicalProcessorInformationEx");
+ if (!GetLogicalProcessorInformationEx) {
+ return 0;
+ }
+
+ GetLogicalProcessorInformationEx(RelationAll, NULL, &length);
+ if (length < 1 || GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
+ return 0;
+ }
+
+ buffer = malloc(length);
+ if (!buffer || !GetLogicalProcessorInformationEx(RelationAll, (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX)buffer, &length)) {
+ free(buffer);
+ return 0;
+ }
+
+ for (DWORD offset = 0; offset < length;) {
+ PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX info = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX)(buffer + offset);
+ offset += info->Size;
+ if (info->Relationship != RelationProcessorCore) {
+ continue;
+ }
+ for (WORD group = 0; group < info->Processor.GroupCount; ++group) {
+ for (KAFFINITY mask = info->Processor.GroupMask[group].Mask; mask != 0; mask >>= 1) {
+ n_cores += mask & 1;
+ }
+ }
+ }
+ free(buffer);
+ return n_cores;
+}
+#endif
+
 /**
  * \brief Returns the number of available physical cores of the host machine
  *
  * \return The number of available physical cores (always >= 1)
  */
 RZ_API size_t rz_th_physical_core_number() {
 #ifdef __WINDOWS__
- SYSTEM_INFO sysinfo;
- GetSystemInfo(&sysinfo);
- return sysinfo.dwNumberOfProcessors;
+ size_t n_cores = get_windows_numa_n_cores();
+ if (n_cores > 0) {
+ return n_cores;
+ }
+ return get_windows_compatible_n_cores();
 #elif __APPLE__ || __FreeBSD__ || __OpenBSD__ || __DragonFly__ || __NetBSD__
  int os_status = 0;
  int mib[4];