cstuff

Macro to add file and line number to printf

#define STRINGIFY(x) #x

#define LINETOSTR(x) STRINGIFY(x)

#define PRINTDEBUG(...) printf(__FILE__ ":" LINETOSTR(__LINE__) ": " __VA_ARGS__)

Compile-time check for struct sizes

#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))

int main(void)

{

BUILD_BUG_ON(sizeof(struct_type_t) != 8);

}

Performance timing

struct timespec start = { 0 };

struct timespec stop = { 0 };

static uint64_t cumulativeTime = 0;

static int32_t count = 0;

clock_gettime(CLOCK_MONOTONIC_RAW, &start);

// do stuff

clock_gettime(CLOCK_MONOTONIC_RAW, &stop);

cumulativeTime += ((stop.tv_sec * 1000000000LL) + stop.tv_nsec) - ((start.tv_sec * 1000000000LL) + start.tv_nsec);

count++;

if (0 == count % 256) {

printf("time=%lu ns (n=%d)\n", cumulativeTime, count);

cumulativeTime = 0;

}