You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
138 lines
5.2 KiB
138 lines
5.2 KiB
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _INCLUDE_SYS__SYSTEM_PROPERTIES_H
|
|
#define _INCLUDE_SYS__SYSTEM_PROPERTIES_H
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <stdint.h>
|
|
|
|
#ifndef _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
|
|
#error you should #include <sys/system_properties.h> instead
|
|
#endif
|
|
|
|
#include <sys/system_properties.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
#define PROP_SERVICE_NAME "property_service"
|
|
#define PROP_FILENAME "/dev/__properties__"
|
|
|
|
#define PROP_MSG_SETPROP 1
|
|
#define PROP_MSG_SETPROP2 0x00020001
|
|
|
|
#define PROP_SUCCESS 0
|
|
#define PROP_ERROR_READ_CMD 0x0004
|
|
#define PROP_ERROR_READ_DATA 0x0008
|
|
#define PROP_ERROR_READ_ONLY_PROPERTY 0x000B
|
|
#define PROP_ERROR_INVALID_NAME 0x0010
|
|
#define PROP_ERROR_INVALID_VALUE 0x0014
|
|
#define PROP_ERROR_PERMISSION_DENIED 0x0018
|
|
#define PROP_ERROR_INVALID_CMD 0x001B
|
|
#define PROP_ERROR_HANDLE_CONTROL_MESSAGE 0x0020
|
|
#define PROP_ERROR_SET_FAILED 0x0024
|
|
|
|
/*
|
|
** This was previously for testing, but now that SystemProperties is its own testable class,
|
|
** there is never a reason to call this function and its implementation simply returns -1.
|
|
*/
|
|
int __system_property_set_filename(const char* __filename);
|
|
|
|
/*
|
|
** Initialize the area to be used to store properties. Can
|
|
** only be done by a single process that has write access to
|
|
** the property area.
|
|
*/
|
|
int __system_property_area_init(void);
|
|
|
|
/* Read the global serial number of the system properties
|
|
**
|
|
** 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_find
|
|
** could in-turn now find a new object; thus preventing the
|
|
** 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_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_find is worth retrying to see if
|
|
** a property now exists.
|
|
**
|
|
** Returns the serial number on success, -1 on error.
|
|
*/
|
|
uint32_t __system_property_area_serial(void);
|
|
|
|
/* Add a new system property. Can only be done by a single
|
|
** process that has write access to the property area, and
|
|
** that process must handle sequencing to ensure the property
|
|
** does not already exist and that only one property is added
|
|
** or updated at a time.
|
|
**
|
|
** Returns 0 on success, -1 if the property area is full.
|
|
*/
|
|
int __system_property_add(const char* __name, unsigned int __name_length, const char* __value, unsigned int __value_length);
|
|
|
|
/* Update the value of a system property returned by
|
|
** __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.
|
|
**
|
|
** Returns 0 on success, -1 if the parameters are incorrect.
|
|
*/
|
|
int __system_property_update(prop_info* __pi, const char* __value, unsigned int __value_length);
|
|
|
|
/* Read the serial number of a system property returned by
|
|
** __system_property_find.
|
|
**
|
|
** Returns the serial number on success, -1 on error.
|
|
*/
|
|
uint32_t __system_property_serial(const prop_info* __pi);
|
|
|
|
/* Initialize the system properties area in read only mode.
|
|
* Should be done by all processes that need to read system
|
|
* properties.
|
|
*
|
|
* Returns 0 on success, -1 otherwise.
|
|
*/
|
|
int __system_properties_init(void);
|
|
|
|
/* Deprecated: use __system_property_wait instead. */
|
|
uint32_t __system_property_wait_any(uint32_t __old_serial);
|
|
|
|
__END_DECLS
|
|
|
|
#endif
|