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npe: add clock_gettime

--- a/include/npe/time.h

+++ b/include/npe/time.h

@@ -4,6 +4,7 @@

 #include <npe.h>

 typedef long time_t;

+typedef int clockid_t;

 struct tm {

 	int tm_sec;

@@ -18,6 +19,16 @@

 	char *tm_zone;

 };

+struct timespec {

+	time_t tv_sec;

+	long tv_nsec;

+};

+

+enum {

+	CLOCK_REALTIME,

+	CLOCK_MONOTONIC,

+};

+

 #include <sys/time.h>

 #define localtime npe_localtime

@@ -26,5 +37,6 @@

 struct tm *npe_gmtime(time_t *timep);

 size_t strftime(char *s, size_t max, const char *format, const struct tm *tm);

 time_t mktime(struct tm *tm);

+int clock_gettime(clockid_t clockid, struct timespec *tp);

 #endif

--- /dev/null

+++ b/libnpe/clock_gettime.c

@@ -1,0 +1,23 @@

+#include <errno.h>

+#include <time.h>

+#include "_npe.h"

+

+int

+clock_gettime(clockid_t clockid, struct timespec *tp)

+{

+	uvlong t;

+

+	if(clockid == CLOCK_REALTIME)

+		t = nsec();

+	else if(clockid == CLOCK_MONOTONIC)

+		t = npe_nanosec();

+	else{

+		errno = EINVAL;

+		return -1;

+	}

+

+	tp->tv_nsec = t % 1000000000;

+	tp->tv_sec = t / 1000000000;

+

+	return 0;

+}

--- a/libnpe/mkfile

+++ b/libnpe/mkfile

@@ -16,6 +16,7 @@

 	acosh.$O\

 	basename.$O\

 	cbrtf.$O\

+	clock_gettime.$O\

 	closedir.$O\

 	dirfd.$O\

 	dirname.$O\