fixup: fix win build

Author: not-matthias

core/include/measurement.hpp

@@ -4,8 +4,11 @@
 #include <string>
 #ifdef _WIN32
 #include <process.h>
+#define getpid _getpid
+#define ALWAYS_INLINE __forceinline
 #else
 #include <unistd.h>
+#define ALWAYS_INLINE __attribute__((always_inline))
 #endif
 
 extern "C" {
@@ -37,21 +40,17 @@ inline void measurement_set_metadata() {
   instrument_hooks_set_integration(g_hooks, "codspeed-cpp", version.c_str());
 }
 
-__attribute__((always_inline)) inline void measurement_start() {
+ALWAYS_INLINE inline void measurement_start() {
   instrument_hooks_start_benchmark_inline(g_hooks);
 }
 
-__attribute__((always_inline)) inline void measurement_stop() {
+ALWAYS_INLINE inline void measurement_stop() {
   instrument_hooks_stop_benchmark_inline(g_hooks);
 }
 
-__attribute__((always_inline)) inline void measurement_set_executed_benchmark(
+ALWAYS_INLINE inline void measurement_set_executed_benchmark(
     const std::string& name) {
-#ifdef _WIN32
-  auto current_pid = _getpid();
-#else
   auto current_pid = getpid();
-#endif
   instrument_hooks_executed_benchmark(g_hooks, current_pid, name.c_str());
 }