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zos: use stckf builtin for high-res timer

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Instead of gettimeofday which is too heavy for a fast
monotonic clock implementation.

PR-URL: https://github.com/libuv/libuv/pull/1394
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This commit is contained in:
John Barboza 2017-06-27 02:16:42 -04:00 committed by Ben Noordhuis
parent 391e818c4a
commit 4776195cdf
1 changed files with 5 additions and 3 deletions
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8
src/unix/os390.c
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@ -25,6 +25,7 @@
#include <utmpx.h>
#include <unistd.h>
#include <sys/ps.h>
#include <builtins.h>
#if defined(__clang__)
#include "csrsic.h"
#else
@ -118,9 +119,10 @@ void uv__platform_loop_delete(uv_loop_t* loop) {
uint64_t uv__hrtime(uv_clocktype_t type) {
struct timeval time;
gettimeofday(&time, NULL);
return (uint64_t) time.tv_sec * 1e9 + time.tv_usec * 1e3;
unsigned long long timestamp;
__stckf(&timestamp);
/* Convert to nanoseconds */
return timestamp / 10;
}