le_cfg_interface.h File Reference
#include "legato.h"
Go to the source code of this file.
Macros | |
#define | LE_CFG_STR_LEN 511 |
#define | LE_CFG_STR_LEN_BYTES 512 |
#define | LE_CFG_NAME_LEN 127 |
#define | LE_CFG_NAME_LEN_BYTES 128 |
Typedefs | |
typedef struct le_cfg_Iterator * | le_cfg_IteratorRef_t |
typedef struct le_cfg_ChangeHandler * | le_cfg_ChangeHandlerRef_t |
typedef void(* | le_cfg_ChangeHandlerFunc_t) (void *contextPtr) |
Enumerations | |
enum | le_cfg_nodeType_t { LE_CFG_TYPE_EMPTY = 0, LE_CFG_TYPE_STRING = 1, LE_CFG_TYPE_BOOL = 2, LE_CFG_TYPE_INT = 3, LE_CFG_TYPE_FLOAT = 4, LE_CFG_TYPE_STEM = 5, LE_CFG_TYPE_DOESNT_EXIST = 6 } |
Functions | |
void | le_cfg_ConnectService (void) |
le_result_t | le_cfg_TryConnectService (void) |
void | le_cfg_DisconnectService (void) |
le_cfg_IteratorRef_t | le_cfg_CreateReadTxn (const char *basePath) |
le_cfg_IteratorRef_t | le_cfg_CreateWriteTxn (const char *basePath) |
void | le_cfg_CommitTxn (le_cfg_IteratorRef_t iteratorRef) |
void | le_cfg_CancelTxn (le_cfg_IteratorRef_t iteratorRef) |
void | le_cfg_GoToNode (le_cfg_IteratorRef_t iteratorRef, const char *newPath) |
le_result_t | le_cfg_GoToParent (le_cfg_IteratorRef_t iteratorRef) |
le_result_t | le_cfg_GoToFirstChild (le_cfg_IteratorRef_t iteratorRef) |
le_result_t | le_cfg_GoToNextSibling (le_cfg_IteratorRef_t iteratorRef) |
le_result_t | le_cfg_GetPath (le_cfg_IteratorRef_t iteratorRef, const char *path, char *pathBuffer, size_t pathBufferNumElements) |
le_cfg_nodeType_t | le_cfg_GetNodeType (le_cfg_IteratorRef_t iteratorRef, const char *path) |
le_result_t | le_cfg_GetNodeName (le_cfg_IteratorRef_t iteratorRef, const char *path, char *name, size_t nameNumElements) |
le_cfg_ChangeHandlerRef_t | le_cfg_AddChangeHandler (const char *newPath, le_cfg_ChangeHandlerFunc_t handlerPtr, void *contextPtr) |
void | le_cfg_RemoveChangeHandler (le_cfg_ChangeHandlerRef_t addHandlerRef) |
void | le_cfg_DeleteNode (le_cfg_IteratorRef_t iteratorRef, const char *path) |
bool | le_cfg_IsEmpty (le_cfg_IteratorRef_t iteratorRef, const char *path) |
void | le_cfg_SetEmpty (le_cfg_IteratorRef_t iteratorRef, const char *path) |
bool | le_cfg_NodeExists (le_cfg_IteratorRef_t iteratorRef, const char *path) |
le_result_t | le_cfg_GetString (le_cfg_IteratorRef_t iteratorRef, const char *path, char *value, size_t valueNumElements, const char *defaultValue) |
void | le_cfg_SetString (le_cfg_IteratorRef_t iteratorRef, const char *path, const char *value) |
int32_t | le_cfg_GetInt (le_cfg_IteratorRef_t iteratorRef, const char *path, int32_t defaultValue) |
void | le_cfg_SetInt (le_cfg_IteratorRef_t iteratorRef, const char *path, int32_t value) |
double | le_cfg_GetFloat (le_cfg_IteratorRef_t iteratorRef, const char *path, double defaultValue) |
void | le_cfg_SetFloat (le_cfg_IteratorRef_t iteratorRef, const char *path, double value) |
bool | le_cfg_GetBool (le_cfg_IteratorRef_t iteratorRef, const char *path, bool defaultValue) |
void | le_cfg_SetBool (le_cfg_IteratorRef_t iteratorRef, const char *path, bool value) |
void | le_cfg_QuickDeleteNode (const char *path) |
void | le_cfg_QuickSetEmpty (const char *path) |
le_result_t | le_cfg_QuickGetString (const char *path, char *value, size_t valueNumElements, const char *defaultValue) |
void | le_cfg_QuickSetString (const char *path, const char *value) |
int32_t | le_cfg_QuickGetInt (const char *path, int32_t defaultValue) |
void | le_cfg_QuickSetInt (const char *path, int32_t value) |
double | le_cfg_QuickGetFloat (const char *path, double defaultValue) |
void | le_cfg_QuickSetFloat (const char *path, double value) |
bool | le_cfg_QuickGetBool (const char *path, bool defaultValue) |
void | le_cfg_QuickSetBool (const char *path, bool value) |
Detailed Description
Legato Config Tree API include file.
Copyright (C) Sierra Wireless Inc. Use of this work is subject to license.
Macro Definition Documentation
#define LE_CFG_NAME_LEN 127 |
Allowed length of a node name.
#define LE_CFG_NAME_LEN_BYTES 128 |
The node name length, including a trailing NULL.
#define LE_CFG_STR_LEN 511 |
Length of the strings used by this API.
#define LE_CFG_STR_LEN_BYTES 512 |
Length of the strings used by this API, including the trailing NULL.
Typedef Documentation
typedef void(* le_cfg_ChangeHandlerFunc_t) (void *contextPtr) |
Handler for node change notifications.
- Parameters
-
contextPtr
typedef struct le_cfg_ChangeHandler* le_cfg_ChangeHandlerRef_t |
Reference type used by Add/Remove functions for EVENT 'le_cfg_Change'
typedef struct le_cfg_Iterator* le_cfg_IteratorRef_t |
Reference to a tree iterator object.
Enumeration Type Documentation
enum le_cfg_nodeType_t |
Identifies the type of node.
Function Documentation
le_cfg_ChangeHandlerRef_t le_cfg_AddChangeHandler | ( | const char * | newPath, |
le_cfg_ChangeHandlerFunc_t | handlerPtr, | ||
void * | contextPtr | ||
) |
Add handler function for EVENT 'le_cfg_Change'
This event provides information on changes to the given node object, or any of it's children, where a change could be either a read, write, create or delete operation.
- Parameters
-
[in] newPath Path to the object to watch. [in] handlerPtr [in] contextPtr
void le_cfg_CancelTxn | ( | le_cfg_IteratorRef_t | iteratorRef | ) |
Close and free the given iterator object. If the iterator is a write iterator, the transaction will be canceled. If the iterator is a read iterator, the transaction will be closed.
- Note
- This operation will also delete the iterator object.
- Parameters
-
[in] iteratorRef Iterator object to close.
void le_cfg_CommitTxn | ( | le_cfg_IteratorRef_t | iteratorRef | ) |
Close the write iterator and commit the write transaction. This updates the config tree with all of the writes that occured using the iterator.
- Note
- This operation will also delete the iterator object.
- Parameters
-
[in] iteratorRef Iterator object to commit.
void le_cfg_ConnectService | ( | void | ) |
Connect the current client thread to the service providing this API. Block until the service is available.
For each thread that wants to use this API, either ConnectService or TryConnectService must be called before any other functions in this API. Normally, ConnectService is automatically called for the main thread, but not for any other thread. For details, see Client-specific Functions.
This function is created automatically.
le_cfg_IteratorRef_t le_cfg_CreateReadTxn | ( | const char * | basePath | ) |
Create a read transaction and open a new iterator for traversing the config tree.
- Note
- This action creates a read lock on the given tree, which will start a read-timeout. Once the read timeout expires, all active read iterators on that tree will be expired and the clients will be killed.
- A tree transaction is global to that tree; a long-held read transaction will block other user's write transactions from being comitted.
- Returns
- This will return a newly created iterator reference.
- Parameters
-
[in] basePath Path to the location to create the new iterator.
le_cfg_IteratorRef_t le_cfg_CreateWriteTxn | ( | const char * | basePath | ) |
Create a write transaction and open a new iterator for both reading and writing.
- Note
- This action creates a write transaction. If the app holds the iterator for longer than the configured write transaction timeout, the iterator will cancel the transaction. Other reads will fail to return data, and all writes will be thrown away.
- A tree transaction is global to that tree; a long-held write transaction will block other user's write transactions from being started. Other trees in the system won't be affected.
- Returns
- This will return a newly created iterator reference.
- Parameters
-
[in] basePath Path to the location to create the new iterator.
void le_cfg_DeleteNode | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path | ||
) |
Delete the node specified by the path. If the node doesn't exist, nothing happens. All child nodes are also deleted.
If the path is empty, the iterator's current node is deleted.
Only valid during a write transaction.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position.
void le_cfg_DisconnectService | ( | void | ) |
Disconnect the current client thread from the service providing this API.
Normally, this function doesn't need to be called. After this function is called, there's no longer a connection to the service, and the functions in this API can't be used. For details, see Client-specific Functions.
This function is created automatically.
bool le_cfg_GetBool | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
bool | defaultValue | ||
) |
Read a value from the tree as a boolean. If the node is empty or doesn't exist, the default value is returned. Default value is also returned if the node is a different type than expected.
Valid for both read and write transactions.
If the path is empty, the iterator's current node will be read.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] defaultValue Default value to use if the original can't be read.
double le_cfg_GetFloat | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
double | defaultValue | ||
) |
Read a 64-bit floating point value from the config tree.
If the value is an integer then the value will be promoted to a float. Otherwise, if the underlying value is not a float or integer, the default value will be returned.
If the path is empty, the iterator's current node will be read.
- Note
- Floating point values will only be stored up to 6 digits of precision.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] defaultValue Default value to use if the original can't be read.
int32_t le_cfg_GetInt | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
int32_t | defaultValue | ||
) |
Read a signed integer value from the config tree.
If the underlying value is not an integer, the default value will be returned instead. The default value is also returned if the node does not exist or if it's empty.
If the value is a floating point value, then it will be rounded and returned as an integer.
Valid for both read and write transactions.
If the path is empty, the iterator's current node will be read.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] defaultValue Default value to use if the original can't be read.
le_result_t le_cfg_GetNodeName | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
char * | name, | ||
size_t | nameNumElements | ||
) |
Get the name of the node where the iterator is currently pointing.
- Returns
- - LE_OK Read was completed successfully.
- LE_OVERFLOW Supplied string buffer was not large enough to hold the value.
- Parameters
-
[in] iteratorRef Iterator object to use to read from the tree. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [out] name Read the name of the node object. [in] nameNumElements
le_cfg_nodeType_t le_cfg_GetNodeType | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path | ||
) |
Get the type of node where the iterator is currently pointing.
- Returns
- le_cfg_nodeType_t value indicating the stored value.
- Parameters
-
[in] iteratorRef Iterator object to use to read from the tree. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position.
le_result_t le_cfg_GetPath | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
char * | pathBuffer, | ||
size_t | pathBufferNumElements | ||
) |
Get path to the node where the iterator is currently pointed.
Assuming the following tree:
If the iterator was currently pointing at valueA, GetPath would return the following path:
Optionally, a path to another node can be supplied to this function. So, if the iterator is again on valueA and the relative path ".." is supplied then this function will return the following path:
- Returns
- - LE_OK - The write was completed successfully.
- LE_OVERFLOW - The supplied string buffer was not large enough to hold the value.
- Parameters
-
[in] iteratorRef Iterator to move. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [out] pathBuffer Absolute path to the iterator's current node. [in] pathBufferNumElements
le_result_t le_cfg_GetString | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
char * | value, | ||
size_t | valueNumElements, | ||
const char * | defaultValue | ||
) |
Read a string value from the config tree. If the value isn't a string, or if the node is empty or doesn't exist, the default value will be returned.
Valid for both read and write transactions.
If the path is empty, the iterator's current node will be read.
- Returns
- - LE_OK - Read was completed successfully.
- LE_OVERFLOW - Supplied string buffer was not large enough to hold the value.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [out] value Buffer to write the value into. [in] valueNumElements [in] defaultValue Default value to use if the original can't be read.
le_result_t le_cfg_GoToFirstChild | ( | le_cfg_IteratorRef_t | iteratorRef | ) |
Move the iterator to the the first child of the node where the iterator is currently pointed.
For read iterators without children, this function will fail. If the iterator is a write iterator, then a new node is automatically created. If this node or newly created children of this node are not written to, then this node will not persist even if the iterator is comitted.
- Returns
- Return code will be one of the following values:
- LE_OK - Move was completed successfully. - LE_NOT_FOUND - The given node has no children.
- Parameters
-
[in] iteratorRef Iterator object to move.
le_result_t le_cfg_GoToNextSibling | ( | le_cfg_IteratorRef_t | iteratorRef | ) |
Jump the iterator to the next child node of the current node. Assuming the following tree:
If the iterator is moved to the path, "/baseNode/childA/valueA". After the first GoToNextSibling the iterator will be pointing at valueB. A second call to GoToNextSibling will cause the function to return LE_NOT_FOUND.
- Returns
- Returns one of the following values:
- LE_OK - Commit was completed successfully. - LE_NOT_FOUND - Iterator has reached the end of the current list of siblings. Also returned if the the current node has no siblings.
- Parameters
-
[in] iteratorRef Iterator to iterate.
void le_cfg_GoToNode | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | newPath | ||
) |
Change the node where the iterator is pointing. The path passed can be an absolute or a relative path from the iterators current location.
The target node does not need to exist. Writing a value to a non-existant node will automatically create that node and any ancestor nodes (parent, parent's parent, etc.) that also don't exist.
- Parameters
-
[in] iteratorRef Iterator to move. [in] newPath Absolute or relative path from the current location.
le_result_t le_cfg_GoToParent | ( | le_cfg_IteratorRef_t | iteratorRef | ) |
Move the iterator to the parent of the node.
- Returns
- Return code will be one of the following values:
- LE_OK - Commit was completed successfully. - LE_NOT_FOUND - Current node is the root node: has no parent.
- Parameters
-
[in] iteratorRef Iterator to move.
bool le_cfg_IsEmpty | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path | ||
) |
Check if the given node is empty. A node is also considered empty if it doesn't yet exist. A node is also considered empty if it has no value or is a stem with no children.
If the path is empty, the iterator's current node is queried for emptiness.
Valid for both read and write transactions.
- Returns
- A true if the node is considered empty, false if not.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position.
bool le_cfg_NodeExists | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path | ||
) |
Check to see if a given node in the config tree exists.
- Returns
- True if the specified node exists in the tree. False if not.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position.
void le_cfg_QuickDeleteNode | ( | const char * | path | ) |
Delete the node specified by the path. If the node doesn't exist, nothing happens. All child nodes are also deleted.
- Parameters
-
[in] path Path to the node to delete.
bool le_cfg_QuickGetBool | ( | const char * | path, |
bool | defaultValue | ||
) |
Read a value from the tree as a boolean. If the node is empty or doesn't exist, the default value is returned. This is also true if the node is a different type than expected.
If the value is empty or the node doesn't exist, the default value is returned instead.
- Parameters
-
[in] path Path to the value to write. [in] defaultValue Default value to use if the original can't be read.
double le_cfg_QuickGetFloat | ( | const char * | path, |
double | defaultValue | ||
) |
Read a 64-bit floating point value from the config tree. If the value is an integer, then it is promoted to a float. Otherwise, if the underlying value is not a float, or an integer the default value will be returned.
If the value is empty or the node doesn't exist, the default value is returned.
- Note
- Floating point values will only be stored up to 6 digits of precision.
- Parameters
-
[in] path Path to the value to write. [in] defaultValue Default value to use if the original can't be read.
int32_t le_cfg_QuickGetInt | ( | const char * | path, |
int32_t | defaultValue | ||
) |
Read a signed integer value from the config tree. If the value is a floating point value, then it will be rounded and returned as an integer. Otherwise If the underlying value is not an integer or a float, the default value will be returned instead.
If the value is empty or the node doesn't exist, the default value is returned instead.
- Parameters
-
[in] path Path to the value to write. [in] defaultValue Default value to use if the original can't be read.
le_result_t le_cfg_QuickGetString | ( | const char * | path, |
char * | value, | ||
size_t | valueNumElements, | ||
const char * | defaultValue | ||
) |
Read a string value from the config tree. If the value isn't a string, or if the node is empty or doesn't exist, the default value will be returned.
- Returns
- - LE_OK - Commit was completed successfully.
- LE_OVERFLOW - Supplied string buffer was not large enough to hold the value.
- Parameters
-
[in] path Path to read from. [out] value Value read from the requested node. [in] valueNumElements [in] defaultValue Default value to use if the original can't be read.
void le_cfg_QuickSetBool | ( | const char * | path, |
bool | value | ||
) |
Write a boolean value to the config tree.
- Parameters
-
[in] path Path to the value to write. [in] value Value to write.
void le_cfg_QuickSetEmpty | ( | const char * | path | ) |
Make a given node empty. If the node doesn't currently exist then it is created as a new empty node.
- Parameters
-
[in] path Absolute or relative path to read from.
void le_cfg_QuickSetFloat | ( | const char * | path, |
double | value | ||
) |
Write a 64-bit floating point value to the config tree.
- Note
- Floating point values will only be stored up to 6 digits of precision.
- Parameters
-
[in] path Path to the value to write. [in] value Value to write.
void le_cfg_QuickSetInt | ( | const char * | path, |
int32_t | value | ||
) |
Write a signed integer value to the config tree.
- Parameters
-
[in] path Path to the value to write. [in] value Value to write.
void le_cfg_QuickSetString | ( | const char * | path, |
const char * | value | ||
) |
Write a string value to the config tree.
- Parameters
-
[in] path Path to the value to write. [in] value Value to write.
void le_cfg_RemoveChangeHandler | ( | le_cfg_ChangeHandlerRef_t | addHandlerRef | ) |
Remove handler function for EVENT 'le_cfg_Change'
- Parameters
-
[in] addHandlerRef
void le_cfg_SetBool | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
bool | value | ||
) |
Write a boolean value to the config tree. Only valid during a write transaction.
If the path is empty, the iterator's current node will be set.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] value Value to write.
void le_cfg_SetEmpty | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path | ||
) |
Clear out the nodes's value. If it doesn't exist it will be created, but have no value.
If the path is empty, the iterator's current node will be cleared. If the node is a stem then all children will be removed from the tree.
Only valid during a write transaction.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position.
void le_cfg_SetFloat | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
double | value | ||
) |
Write a 64-bit floating point value to the config tree. Only valid during a write transaction.
If the path is empty, the iterator's current node will be set.
- Note
- Floating point values will only be stored up to 6 digits of precision.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] value Value to write.
void le_cfg_SetInt | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
int32_t | value | ||
) |
Write a signed integer value to the config tree. Only valid during a write transaction.
If the path is empty, the iterator's current node will be set.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] value Value to write.
void le_cfg_SetString | ( | le_cfg_IteratorRef_t | iteratorRef, |
const char * | path, | ||
const char * | value | ||
) |
Write a string value to the config tree. Only valid during a write transaction.
If the path is empty, the iterator's current node will be set.
- Parameters
-
[in] iteratorRef Iterator to use as a basis for the transaction. [in] path Path to the target node. Can be an absolute path, or a path relative from the iterator's current position. [in] value Value to write.
le_result_t le_cfg_TryConnectService | ( | void | ) |
Try to connect the current client thread to the service providing this API. Return with an error if the service is not available.
For each thread that wants to use this API, either ConnectService or TryConnectService must be called before any other functions in this API. Normally, ConnectService is automatically called for the main thread, but not for any other thread. For details, see Client-specific Functions.
This function is created automatically.
- Returns
- LE_OK if the client connected successfully to the service.
- LE_UNAVAILABLE if the server is not currently offering the service to which the client is bound.
- LE_NOT_PERMITTED if the client interface is not bound to any service (doesn't have a binding).
- LE_COMM_ERROR if the Service Directory cannot be reached.