25 lines
529 B
C
25 lines
529 B
C
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#ifdef GETTIMEOFDAY
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#include <sys/time.h> // For struct timeval, gettimeofday
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#else
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#include <time.h> // For struct timespec, clock_gettime, CLOCK_MONOTONIC
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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double wall_time() {
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#ifdef GETTIMEOFDAY
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struct timeval t;
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gettimeofday(&t, NULL);
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return 1. * t.tv_sec + 1.e-6 * t.tv_usec;
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#else
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struct timespec t;
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clock_gettime(CLOCK_MONOTONIC, &t);
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return 1. * t.tv_sec + 1.e-9 * t.tv_nsec;
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#endif
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}
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void die(const char *message) {
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perror(message);
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exit(EXIT_FAILURE);
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}
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