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am f7cf8b2c: Merge "bionic: tzset running hot"

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* commit 'f7cf8b2c1fbf6250e12d1e59aa353990eca4f109':
  bionic: tzset running hot
This commit is contained in:
Mark Salyzyn 2015-10-02 21:10:18 +00:00 committed by Android Git Automerger
commit ee9dea83fb
1 changed files with 24 additions and 4 deletions
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28
libc/tzcode/localtime.c
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@ -1211,7 +1211,9 @@ tzsetwall(void)
settzname();
}
#include <sys/system_properties.h> // For __system_property_get.
#include <stdbool.h>
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h> // For __system_property_serial.
static void
tzset_locked(void)
@ -1221,9 +1223,27 @@ tzset_locked(void)
name = getenv("TZ");
// try the "persist.sys.timezone" system property first
static char buf[PROP_VALUE_MAX];
if (name == NULL && __system_property_get("persist.sys.timezone", buf) > 0) {
name = buf;
if (name == NULL) {
static const prop_info *pi;
if (!pi) {
pi = __system_property_find("persist.sys.timezone");
}
if (pi) {
static char buf[PROP_VALUE_MAX];
static uint32_t s = -1;
static bool ok = false;
uint32_t serial;
serial = __system_property_serial(pi);
if (serial != s) {
ok = __system_property_read(pi, 0, buf) > 0;
s = serial;
}
if (ok) {
name = buf;
}
}
}
if (name == NULL) {