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authorDenis Vlasenko <vda.linux@googlemail.com>2007-06-17 19:09:05 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2007-06-17 19:09:05 +0000
commit459be35234cc24b69309eb0ee22600024c73713e (patch)
tree15ac4122d9c42ec75ba68d342827e37fcb1306ed /libbb/time.c
parente79dd06782175d50f639180cde5b2c56933aa2ee (diff)
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hwclock: size optimizations
libbb/time.c: new file, introducing monotonic_us() pscan, traceroute, arping: use it instead of gettimeofday ping, zcip: TODO function old new delta monotonic_us - 89 +89 find_pair 164 180 +16 .rodata 129747 129763 +16 refresh 1144 1152 +8 ............ timeout 8 4 -4 static.start 8 4 -4 last 8 4 -4 parse_conf 1303 1284 -19 time_main 1149 1124 -25 gettimeofday_us 39 - -39 arping_main 2042 1969 -73 hwclock_main 594 501 -93 catcher 485 380 -105 traceroute_main 4300 4117 -183 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 8/11 up/down: 157/-562) Total: -405 bytes
Diffstat (limited to 'libbb/time.c')
-rw-r--r--libbb/time.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/libbb/time.c b/libbb/time.c
new file mode 100644
index 000000000..f2a741521
--- /dev/null
+++ b/libbb/time.c
@@ -0,0 +1,32 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * Copyright (C) 2007 Denis Vlasenko
6 *
7 * Licensed under GPL version 2, see file LICENSE in this tarball for details.
8 */
9
10#include "libbb.h"
11
12#if ENABLE_MONOTONIC_SYSCALL
13#include <sys/syscall.h>
14
15/* libc has incredibly messy way of doing this,
16 * typically requiring -lrt. We just skip all this mess */
17unsigned long long monotonic_us(void)
18{
19 struct timespec ts;
20 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
21 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
22 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
23}
24#else
25unsigned long long monotonic_us(void)
26{
27 struct timeval tv;
28 if (gettimeofday(&tv, NULL))
29 bb_error_msg_and_die("gettimeofday failed");
30 return tv.tv_sec * 1000000ULL + tv_usec;
31}
32#endif