Simple Macro Based Function Profiler in C

main.c

#include "simple_profiler.h"

#ifdef LINUX
	#include <unistd.h>
#endif
#ifdef WINDOWS
	#include <windows.h>
#endif

void _sleepms(int ms) {
#ifdef LINUX
	usleep(sleepMs * 1000);
#endif
#ifdef WINDOWS
	Sleep(ms);
#endif
}

int main(void) {
	MEASURE_FUNC_TIME_START();
	_sleepms(111);
	MEASURE_FUNC_TIME_END("_sleepms(111);");
	return 0;
}

simple_profiler.h

#include <stdio.h>
#include <time.h>

clock_t __clockTimeRecorded = 0;
#define MEASURE_FUNC_TIME_START() __clockTimeRecorded = clock()
#define MEASURE_FUNC_TIME_END(strPrefix) \
	__clockTimeRecorded = clock() - __clockTimeRecorded; \
	printf("%s took %fms\n", strPrefix, ((double)__clockTimeRecorded/CLOCKS_PER_SEC) * 1000)