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-rw-r--r--src/pulse/timeval.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/pulse/timeval.c b/src/pulse/timeval.c
index 70ceb71e..180e0159 100644
--- a/src/pulse/timeval.c
+++ b/src/pulse/timeval.c
@@ -148,6 +148,24 @@ struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v) {
return tv;
}
+struct timeval* pa_timeval_sub(struct timeval *tv, pa_usec_t v) {
+ unsigned long secs;
+ pa_assert(tv);
+
+ secs = (unsigned long) (v/PA_USEC_PER_SEC);
+ tv->tv_sec -= secs;
+ v -= ((pa_usec_t) secs) * PA_USEC_PER_SEC;
+
+ if (tv->tv_usec >= (suseconds_t) v)
+ tv->tv_usec -= (suseconds_t) v;
+ else {
+ tv->tv_sec --;
+ tv->tv_usec = tv->tv_usec + PA_USEC_PER_SEC - v;
+ }
+
+ return tv;
+}
+
struct timeval* pa_timeval_store(struct timeval *tv, pa_usec_t v) {
pa_assert(tv);