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authorRickard Green <[email protected]>2014-10-30 23:57:01 +0100
committerRickard Green <[email protected]>2015-03-20 15:23:10 +0100
commit6487aac5977cf470bc6a2cd0964da2850ee38717 (patch)
tree84fa1670c6d09a57655c1b7be75fb5e34c5981ec /erts/etc/common
parentcd917e88f5718eead826c896864cfe85cd3d301b (diff)
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Introduce a new time API
The old time API is based on erlang:now/0. The major issue with erlang:now/0 is that it was intended to be used for so many unrelated things. This tied these unrelated operations together and unnecessarily caused performance, scalability as well as accuracy, and precision issues for operations that do not need to have such issues. The new API spreads different functionality over multiple functions in order to improve on this. The new API consists of a number of new BIFs: - erlang:convert_time_unit/3 - erlang:monotonic_time/0 - erlang:monotonic_time/1 - erlang:system_time/0 - erlang:system_time/1 - erlang:time_offset/0 - erlang:time_offset/1 - erlang:timestamp/0 - erlang:unique_integer/0 - erlang:unique_integer/1 - os:system_time/0 - os:system_time/1 and a number of extensions of existing BIFs: - erlang:monitor(time_offset, clock_service) - erlang:system_flag(time_offset, finalize) - erlang:system_info(os_monotonic_time_source) - erlang:system_info(time_offset) - erlang:system_info(time_warp_mode) - erlang:system_info(time_correction) - erlang:system_info(start_time) See the "Time and Time Correction in Erlang" chapter of the ERTS User's Guide for more information.
Diffstat (limited to 'erts/etc/common')
-rw-r--r--erts/etc/common/erlexec.c18
-rw-r--r--erts/etc/common/heart.c10
2 files changed, 21 insertions, 7 deletions
diff --git a/erts/etc/common/erlexec.c b/erts/etc/common/erlexec.c
index 5ebde8ca3c..d33ea59c1d 100644
--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -807,6 +807,7 @@ int main(int argc, char **argv)
case 'a':
case 'A':
case 'b':
+ case 'C':
case 'e':
case 'i':
case 'n':
@@ -880,6 +881,19 @@ int main(int argc, char **argv)
}
add_Eargs(argv[i]);
break;
+ case 'c':
+ argv[i][0] = '-';
+ if (argv[i][2] == '\0' && i+1 < argc) {
+ if (sys_strcmp(argv[i+1], "true") == 0
+ || sys_strcmp(argv[i+1], "false") == 0) {
+ add_Eargs(argv[i]);
+ add_Eargs(argv[i+1]);
+ i++;
+ break;
+ }
+ }
+ add_Eargs(argv[i]);
+ break;
case 'M': {
int x;
for (x = 0; plusM_au_allocs[x]; x++)
@@ -1149,8 +1163,8 @@ usage_aux(void)
#endif
"] "
"[-make] [-man [manopts] MANPAGE] [-x] [-emu_args] "
- "[-args_file FILENAME] [+A THREADS] [+a SIZE] [+B[c|d|i]] [+c] "
- "[+h HEAP_SIZE_OPTION] [+K BOOLEAN] "
+ "[-args_file FILENAME] [+A THREADS] [+a SIZE] [+B[c|d|i]] [+c [BOOLEAN]] "
+ "[+C MODE] [+h HEAP_SIZE_OPTION] [+K BOOLEAN] "
"[+l] [+M<SUBSWITCH> <ARGUMENT>] [+P MAX_PROCS] [+Q MAX_PORTS] "
"[+R COMPAT_REL] "
"[+r] [+rg READER_GROUPS_LIMIT] [+s SCHEDULER_OPTION] "
diff --git a/erts/etc/common/heart.c b/erts/etc/common/heart.c
index 2830641802..a4f34e21d0 100644
--- a/erts/etc/common/heart.c
+++ b/erts/etc/common/heart.c
@@ -109,7 +109,7 @@
# include <sys/time.h>
# include <unistd.h>
# include <signal.h>
-# if defined(CORRECT_USING_TIMES)
+# if defined(OS_MONOTONIC_TIME_USING_TIMES)
# include <sys/times.h>
# include <limits.h>
# endif
@@ -1084,9 +1084,9 @@ time_t timestamp(time_t *res)
return r;
}
-#elif defined(HAVE_GETHRTIME) || defined(GETHRTIME_WITH_CLOCK_GETTIME)
+#elif defined(OS_MONOTONIC_TIME_USING_GETHRTIME) || defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME)
-#if defined(GETHRTIME_WITH_CLOCK_GETTIME)
+#if defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME)
typedef long long SysHrTime;
SysHrTime sys_gethrtime(void);
@@ -1095,7 +1095,7 @@ SysHrTime sys_gethrtime(void)
{
struct timespec ts;
long long result;
- if (clock_gettime(CLOCK_MONOTONIC,&ts) != 0) {
+ if (clock_gettime(MONOTONIC_CLOCK_ID,&ts) != 0) {
print_error("Fatal, could not get clock_monotonic value, terminating! "
"errno = %d\n", errno);
exit(1);
@@ -1122,7 +1122,7 @@ time_t timestamp(time_t *res)
return r;
}
-#elif defined(CORRECT_USING_TIMES)
+#elif defined(OS_MONOTONIC_TIME_USING_TIMES)
# ifdef NO_SYSCONF
# include <sys/param.h>