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Match resetprop files with AOSP

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topjohnwu
2017-07-07 22:29:55 +08:00
parent f3b68e6543
commit 9679492c28
4 changed files with 39 additions and 19 deletions
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24
jni/resetprop/_system_properties.h
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@ -73,22 +73,22 @@ int __system_property_area_init2();
/* Read the global serial number of the system properties
**
** Called to predict if a series of cached __system_property_find2
** objects will have seen __system_property_serial2 values change.
** Called to predict if a series of cached __system_property_find
** objects will have seen __system_property_serial values change.
** But also aids the converse, as changes in the global serial can
** also be used to predict if a failed __system_property_find2
** also be used to predict if a failed __system_property_find
** could in-turn now find a new object; thus preventing the
** cycles of effort to poll __system_property_find2.
** cycles of effort to poll __system_property_find.
**
** Typically called at beginning of a cache cycle to signal if _any_ possible
** changes have occurred since last. If there is, one may check each individual
** __system_property_serial2 to confirm dirty, or __system_property_find2
** to check if the property now exists. If a call to __system_property_add2
** or __system_property_update2 has completed between two calls to
** __system_property_area_serial2 then the second call will return a larger
** __system_property_serial to confirm dirty, or __system_property_find
** to check if the property now exists. If a call to __system_property_add
** or __system_property_update has completed between two calls to
** __system_property_area_serial then the second call will return a larger
** value than the first call. Beware of race conditions as changes to the
** properties are not atomic, the main value of this call is to determine
** whether the expensive __system_property_find2 is worth retrying to see if
** whether the expensive __system_property_find is worth retrying to see if
** a property now exists.
**
** Returns the serial number on success, -1 on error.
@ -112,7 +112,7 @@ int __system_property_add2(const char *name, unsigned int namelen, const char *v
int __system_property_del(const char *name);
/* Update the value of a system property returned by
** __system_property_find2. Can only be done by a single process
** __system_property_find. Can only be done by a single process
** that has write access to the property area, and that process
** must handle sequencing to ensure that only one property is
** updated at a time.
@ -122,7 +122,7 @@ int __system_property_del(const char *name);
int __system_property_update2(prop_info *pi, const char *value, unsigned int len);
/* Read the serial number of a system property returned by
** __system_property_find2.
** __system_property_find.
**
** Returns the serial number on success, -1 on error.
*/
@ -136,7 +136,7 @@ uint32_t __system_property_serial2(const prop_info* pi);
*/
int __system_properties_init2();
/* Deprecated: use __system_property_wait2 instead. */
/* Deprecated: use __system_property_wait instead. */
uint32_t __system_property_wait_any2(uint32_t old_serial);
__END_DECLS