advent2025

commit efa5101ffd0cf13d5a86e6def1e16ca4adab1bd5
parent 2823dda5cf87d879d93c5ebf26b146dabeca0d48
Author: bsandro <email@bsandro.tech>
Date:   Fri,  5 Dec 2025 23:37:49 +0200

cputime implementation is now somewhat portable

Diffstat:
M
cputime.h
 | 
11
++++-------

1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/cputime.h b/cputime.h
@@ -1,15 +1,12 @@
 #pragma once
 #include <time.h>
-static volatile unsigned long long now = 0;
+static volatile double time_started = 0;
 
 void __attribute((constructor)) begin() {
-    struct timespec ts;
-    clock_gettime(CLOCK_MONOTONIC, &ts);
-    now = ts.tv_sec + ts.tv_nsec;
+    time_started = clock();
 }
 
 void __attribute((destructor)) end() {
-    struct timespec ts;
-    clock_gettime(CLOCK_MONOTONIC, &ts);
-    printf("%f s\n", (double)((ts.tv_sec+ts.tv_nsec)-now)/1e9);
+    double elapsed = clock() - time_started;
+    printf("Elapsed: %f s\n", elapsed/CLOCKS_PER_SEC);
 }