Add utcp_set_clock_granularity().

This overrides the value gotten from clock_getres(), and is intended for
use by an application that knows it might not call utcp_timeout()
exactly on time.

diff --git a/utcp.c b/utcp.c
index cc17b0f744b0f4b63109daed01b55996f50f7613..0b36de15263b8b005c0625f866e901054432b5ba 100644 (file)
--- a/utcp.c
+++ b/utcp.c
@@ -73,7 +73,7 @@ static bool timespec_isset(const struct timespec *a) {
        return a->tv_sec;
 }
 
-static long CLOCK_GRANULARITY;
+static long CLOCK_GRANULARITY; // usec
 
 static inline size_t min(size_t a, size_t b) {
        return a < b ? a : b;
@@ -2056,7 +2056,7 @@ struct utcp *utcp_init(utcp_accept_t accept, utcp_pre_accept_t pre_accept, utcp_
        if(!CLOCK_GRANULARITY) {
                struct timespec res;
                clock_getres(UTCP_CLOCK, &res);
-               CLOCK_GRANULARITY = res.tv_sec * NSEC_PER_SEC + res.tv_nsec;
+               CLOCK_GRANULARITY = res.tv_sec * USEC_PER_SEC + res.tv_nsec / 1000;
        }
 
        utcp->accept = accept;
@@ -2331,3 +2331,7 @@ void utcp_offline(struct utcp *utcp, bool offline) {
                utcp->rto = START_RTO;
        }
 }
+
+void utcp_set_clock_granularity(long granularity) {
+       CLOCK_GRANULARITY = granularity;
+}

diff --git a/utcp.h b/utcp.h
index 40cfef6ad49cc372662b160573a2a8001b0e4c66..aed177cb2913bd4dc82fd7a6bbdc8e137c36d634 100644 (file)
--- a/utcp.h
+++ b/utcp.h
@@ -116,4 +116,8 @@ extern size_t utcp_get_outq(struct utcp_connection *connection);
 
 extern void utcp_expect_data(struct utcp_connection *connection, bool expect);
 
+// Completely global options
+
+extern void utcp_set_clock_granularity(long granularity);
+
 #endif