diff options
| -rw-r--r-- | src/pulse/timeval.c | 18 | ||||
| -rw-r--r-- | src/pulse/timeval.h | 6 |
2 files changed, 23 insertions, 1 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); diff --git a/src/pulse/timeval.h b/src/pulse/timeval.h index 65a0e513..315f4190 100644 --- a/src/pulse/timeval.h +++ b/src/pulse/timeval.h @@ -26,6 +26,7 @@ ***/ #include <pulse/cdecl.h> +#include <pulse/gccmacro.h> #include <pulse/sample.h> /** \file @@ -54,7 +55,10 @@ int pa_timeval_cmp(const struct timeval *a, const struct timeval *b) PA_GCC_PURE pa_usec_t pa_timeval_age(const struct timeval *tv); /** Add the specified time inmicroseconds to the specified timeval structure */ -struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v) PA_GCC_PURE; +struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v); + +/** Subtract the specified time inmicroseconds to the specified timeval structure. \since 0.9.11 */ +struct timeval* pa_timeval_sub(struct timeval *tv, pa_usec_t v); /** Store the specified uec value in the timeval struct. \since 0.9.7 */ struct timeval* pa_timeval_store(struct timeval *tv, pa_usec_t v); |