commit 969a02493ba6c440ba7700a2090b24cbc2bf5a38
from: Omar Polo <op@omarpolo.com>
date: Wed Aug 16 10:30:51 2023 UTC

add portability shim for timespecsub

commit - 27bf07a4f9592ac26e235e10f3a6eb24101aaa80
commit + 969a02493ba6c440ba7700a2090b24cbc2bf5a38
blob - fb082239dfb4bc5d58976a3c4c925d3ef9048873
blob + 916489e295a1ca4238dc0c80a776a3d0e7e2ab7a
--- ev.c
+++ ev.c
@@ -36,6 +36,19 @@
 
 #include "ev.h"
 
+#ifndef timespecsub
+static void
+timespecsub(struct timespec *a, struct timespec *b, struct timespec *ret)
+{
+	ret->tv_sec = a->tv_sec - b->tv_sec;
+	ret->tv_nsec = a->tv_nsec - b->tv_nsec;
+	if (ret->tv_nsec < 0) {
+		ret->tv_sec--;
+		ret->tv_nsec += 1000000000L;
+	}
+}
+#endif
+
 struct evcb {
 	void		(*cb)(int, int, void *);
 	void		*udata;