source: benchmark/bench.h @ 1756e08

#pragma once

#if defined(__cforall)
extern "C" {
#endif
        #include <stdlib.h>
        #include <stdint.h>                             // uint64_t
        #include <unistd.h>                             // sysconf
#if ! defined(__cforall)
        #include <time.h>
        #include <sys/time.h>
#else
}
#include <time.hfa>
#endif


static inline uint64_t bench_time() {
        struct timespec ts;
        clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts );
        return 1000000000LL * ts.tv_sec + ts.tv_nsec;
} // bench_time


#if defined(__cforall)
struct test_spinlock {
        volatile bool lock;
};

static inline void lock( test_spinlock & this ) {
        for ( ;; ) {
                if ( (this.lock == 0) && (__atomic_test_and_set( &this.lock, __ATOMIC_ACQUIRE ) == 0) ) break;
        }
}

static inline void unlock( test_spinlock & this ) {
        __atomic_clear( &this.lock, __ATOMIC_RELEASE );
}
#endif

#ifndef BENCH_N
#define BENCH_N 10000000
#endif

size_t times = BENCH_N;

#define BENCH_START()                           \
        if ( argc > 2 ) exit( EXIT_FAILURE );   \
        if ( argc == 2 ) {                      \
                times = atoi( argv[1] );        \
        }

#define BENCH(statement, output)                \
        uint64_t StartTime, EndTime;            \
        StartTime = bench_time();               \
        statement;                              \
        EndTime = bench_time();                 \
        double output = (double)( EndTime - StartTime ) / times;


#if defined(__cforall)
Duration default_preemption() {
        return 0;
}
#endif
#if defined(__U_CPLUSPLUS__)
unsigned int uDefaultPreemption() {
        return 0;
}
#endif