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Bluetooth Low Energy
Diff: ble/GattServer.h
- Revision:
- 1042:21a86ac7f5b1
- Parent:
- 993:4d62b7967c11
- Child:
- 1048:efb29faf12fc
--- a/ble/GattServer.h Thu Dec 10 09:15:05 2015 +0000
+++ b/ble/GattServer.h Mon Jan 11 08:51:25 2016 +0000
@@ -26,18 +26,9 @@
class GattServer {
public:
-
/* Event callback handlers. */
- typedef FunctionPointerWithContext<unsigned> DataSentCallback_t;
- typedef CallChainOfFunctionPointersWithContext<unsigned> DataSentCallbackChain_t;
-
- typedef FunctionPointerWithContext<const GattWriteCallbackParams*> DataWrittenCallback_t;
- typedef CallChainOfFunctionPointersWithContext<const GattWriteCallbackParams*> DataWrittenCallbackChain_t;
-
- typedef FunctionPointerWithContext<const GattReadCallbackParams*> DataReadCallback_t;
- typedef CallChainOfFunctionPointersWithContext<const GattReadCallbackParams *> DataReadCallbackChain_t;
-
- typedef FunctionPointerWithContext<GattAttribute::Handle_t> EventCallback_t;
+ typedef void (*EventCallback_t)(GattAttribute::Handle_t attributeHandle);
+ typedef void (*ServerEventCallback_t)(void); /**< independent of any particular attribute */
protected:
GattServer() :
@@ -62,14 +53,14 @@
* characteristics contained within.
*/
virtual ble_error_t addService(GattService &service) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)service;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
- * Read the value of a characteristic from the local GATT server.
+ * Read the value of a characteristic from the local GattServer
* @param[in] attributeHandle
* Attribute handle for the value attribute of the characteristic.
* @param[out] buffer
@@ -84,18 +75,18 @@
* @return BLE_ERROR_NONE if a value was read successfully into the buffer.
*/
virtual ble_error_t read(GattAttribute::Handle_t attributeHandle, uint8_t buffer[], uint16_t *lengthP) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)attributeHandle;
(void)buffer;
(void)lengthP;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
- * Read the value of a characteristic from the local GATT server.
+ * Read the value of a characteristic from the local GattServer
* @param[in] connectionHandle
- * Connection handle.
+ * Connection Handle.
* @param[in] attributeHandle
* Attribute handle for the value attribute of the characteristic.
* @param[out] buffer
@@ -109,32 +100,32 @@
*
* @return BLE_ERROR_NONE if a value was read successfully into the buffer.
*
- * @note This API is a version of the above, with an additional connection handle
+ * @note This API is a version of above with an additional connection handle
* parameter to allow fetches for connection-specific multivalued
* attributes (such as the CCCDs).
*/
virtual ble_error_t read(Gap::Handle_t connectionHandle, GattAttribute::Handle_t attributeHandle, uint8_t *buffer, uint16_t *lengthP) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)connectionHandle;
(void)attributeHandle;
(void)buffer;
(void)lengthP;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
- * Update the value of a characteristic on the local GATT server.
+ * Update the value of a characteristic on the local GattServer.
*
* @param[in] attributeHandle
- * Handle for the value attribute of the characteristic.
+ * Handle for the value attribute of the Characteristic.
* @param[in] value
- * A pointer to a buffer holding the new value.
+ * A pointer to a buffer holding the new value
* @param[in] size
* Size of the new value (in bytes).
* @param[in] localOnly
* Should this update be kept on the local
- * GATT server regardless of the state of the
+ * GattServer regardless of the state of the
* notify/indicate flag in the CCCD for this
* Characteristic? If set to true, no notification
* or indication is generated.
@@ -142,26 +133,26 @@
* @return BLE_ERROR_NONE if we have successfully set the value of the attribute.
*/
virtual ble_error_t write(GattAttribute::Handle_t attributeHandle, const uint8_t *value, uint16_t size, bool localOnly = false) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)attributeHandle;
(void)value;
(void)size;
(void)localOnly;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
- * Update the value of a characteristic on the local GATT server. A version
- * of the same as the above, with a connection handle parameter to allow updates
+ * Update the value of a characteristic on the local GattServer. A version
+ * of the same as above with connection handle parameter to allow updates
* for connection-specific multivalued attributes (such as the CCCDs).
*
* @param[in] connectionHandle
- * Connection handle.
+ * Connection Handle.
* @param[in] attributeHandle
- * Handle for the value attribute of the characteristic.
+ * Handle for the value attribute of the Characteristic.
* @param[in] value
- * A pointer to a buffer holding the new value.
+ * A pointer to a buffer holding the new value
* @param[in] size
* Size of the new value (in bytes).
* @param[in] localOnly
@@ -174,54 +165,54 @@
* @return BLE_ERROR_NONE if we have successfully set the value of the attribute.
*/
virtual ble_error_t write(Gap::Handle_t connectionHandle, GattAttribute::Handle_t attributeHandle, const uint8_t *value, uint16_t size, bool localOnly = false) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)connectionHandle;
(void)attributeHandle;
(void)value;
(void)size;
(void)localOnly;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
- * Determine the updates-enabled status (notification or indication) for the current connection from a characteristic's CCCD.
+ * Determine the updates-enabled status (notification/indication) for the current connection from a characteristic's CCCD.
*
* @param characteristic
- * The characteristic.
+ * The characteristic
* @param[out] enabledP
* Upon return, *enabledP is true if updates are enabled, else false.
*
- * @return BLE_ERROR_NONE if the connection and handle are found. False otherwise.
+ * @return BLE_ERROR_NONE if the connection and handle are found. false otherwise.
*/
virtual ble_error_t areUpdatesEnabled(const GattCharacteristic &characteristic, bool *enabledP) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)characteristic;
(void)enabledP;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
- * Determine the connection-specific updates-enabled status (notification or indication) from a characteristic's CCCD.
+ * Determine the connection-specific updates-enabled status (notification/indication) from a characteristic's CCCD.
*
* @param connectionHandle
- * The connection handle.
+ * The connection handle
* @param[out] enabledP
* Upon return, *enabledP is true if updates are enabled, else false.
*
* @param characteristic
- * The characteristic.
+ * The characteristic
*
- * @return BLE_ERROR_NONE if the connection and handle are found. False otherwise.
+ * @return BLE_ERROR_NONE if the connection and handle are found. false otherwise.
*/
virtual ble_error_t areUpdatesEnabled(Gap::Handle_t connectionHandle, const GattCharacteristic &characteristic, bool *enabledP) {
- /* Avoid compiler warnings about unused variables. */
+ /* avoid compiler warnings about unused variables */
(void)connectionHandle;
(void)characteristic;
(void)enabledP;
- return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porters: override this API if this capability is supported. */
+ return BLE_ERROR_NOT_IMPLEMENTED; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/**
@@ -229,7 +220,7 @@
* onDataRead(). It should be overridden to return true as applicable.
*/
virtual bool isOnDataReadAvailable() const {
- return false; /* Requesting action from porters: override this API if this capability is supported. */
+ return false; /* Requesting action from porter(s): override this API if this capability is supported. */
}
/*
@@ -240,81 +231,60 @@
* Add a callback for the GATT event DATA_SENT (which is triggered when
* updates are sent out by GATT in the form of notifications).
*
- * @Note: It is possible to chain together multiple onDataSent callbacks
+ * @Note: it is possible to chain together multiple onDataSent callbacks
* (potentially from different modules of an application) to receive updates
* to characteristics.
*
- * @Note: It is also possible to set up a callback into a member function of
+ * @Note: it is also possible to setup a callback into a member function of
* some object.
*/
- void onDataSent(const DataSentCallback_t& callback) {dataSentCallChain.add(callback);}
+ void onDataSent(void (*callback)(unsigned count)) {dataSentCallChain.add(callback);}
template <typename T>
void onDataSent(T *objPtr, void (T::*memberPtr)(unsigned count)) {
dataSentCallChain.add(objPtr, memberPtr);
}
/**
- * @brief get the callback chain called when the event DATA_EVENT is triggered.
- */
- DataSentCallbackChain_t& onDataSent() {
- return dataSentCallChain;
- }
-
- /**
- * Set up a callback for when an attribute has its value updated by or at the
- * connected peer. For a peripheral, this callback is triggered when the local
+ * Setup a callback for when an attribute has its value updated by or at the
+ * connected peer. For a peripheral, this callback triggered when the local
* GATT server has an attribute updated by a write command from the peer.
- * For a central, this callback is triggered when a response is received for
+ * For a Central, this callback is triggered when a response is received for
* a write request.
*
- * @Note: It is possible to chain together multiple onDataWritten callbacks
+ * @Note: it is possible to chain together multiple onDataWritten callbacks
* (potentially from different modules of an application) to receive updates
- * to characteristics. Many services, such as DFU and UART, add their own
+ * to characteristics. Many services, such as DFU and UART add their own
* onDataWritten callbacks behind the scenes to trap interesting events.
*
- * @Note: It is also possible to set up a callback into a member function of
+ * @Note: it is also possible to setup a callback into a member function of
* some object.
- *
- * @Note It is possible to unregister a callback using onDataWritten().detach(callback)
*/
- void onDataWritten(const DataWrittenCallback_t& callback) {dataWrittenCallChain.add(callback);}
+ void onDataWritten(void (*callback)(const GattWriteCallbackParams *eventDataP)) {dataWrittenCallChain.add(callback);}
template <typename T>
void onDataWritten(T *objPtr, void (T::*memberPtr)(const GattWriteCallbackParams *context)) {
dataWrittenCallChain.add(objPtr, memberPtr);
}
/**
- * @brief provide access to the callchain of data written event callbacks
- * It is possible to register callbacks using onDataWritten().add(callback);
- * It is possible to unregister callbacks using onDataWritten().detach(callback)
- * @return The data written event callbacks chain
- */
- DataWrittenCallbackChain_t& onDataWritten() {
- return dataWrittenCallChain;
- }
-
- /**
* Setup a callback to be invoked on the peripheral when an attribute is
* being read by a remote client.
*
- * @Note: This functionality may not be available on all underlying stacks.
+ * @Note: this functionality may not be available on all underlying stacks.
* You could use GattCharacteristic::setReadAuthorizationCallback() as an
* alternative. Refer to isOnDataReadAvailable().
*
- * @Note: It is possible to chain together multiple onDataRead callbacks
+ * @Note: it is possible to chain together multiple onDataRead callbacks
* (potentially from different modules of an application) to receive updates
* to characteristics. Services may add their own onDataRead callbacks
* behind the scenes to trap interesting events.
*
- * @Note: It is also possible to set up a callback into a member function of
+ * @Note: it is also possible to setup a callback into a member function of
* some object.
*
- * @Note It is possible to unregister a callback using onDataRead().detach(callback)
- *
* @return BLE_ERROR_NOT_IMPLEMENTED if this functionality isn't available;
* else BLE_ERROR_NONE.
*/
- ble_error_t onDataRead(const DataReadCallback_t& callback) {
+ ble_error_t onDataRead(void (*callback)(const GattReadCallbackParams *eventDataP)) {
if (!isOnDataReadAvailable()) {
return BLE_ERROR_NOT_IMPLEMENTED;
}
@@ -333,29 +303,19 @@
}
/**
- * @brief provide access to the callchain of data read event callbacks
- * It is possible to register callbacks using onDataRead().add(callback);
- * It is possible to unregister callbacks using onDataRead().detach(callback)
- * @return The data read event callbacks chain
- */
- DataReadCallbackChain_t& onDataRead() {
- return dataReadCallChain;
- }
-
- /**
- * Set up a callback for when notifications or indications are enabled for a
- * characteristic on the local GATT server.
+ * Setup a callback for when notifications/indications are enabled for a
+ * characteristic on the local GattServer.
*/
void onUpdatesEnabled(EventCallback_t callback) {updatesEnabledCallback = callback;}
/**
- * Set up a callback for when notifications or indications are disabled for a
- * characteristic on the local GATT server.
+ * Setup a callback for when notifications/indications are disabled for a
+ * characteristic on the local GattServer.
*/
void onUpdatesDisabled(EventCallback_t callback) {updatesDisabledCallback = callback;}
/**
- * Set up a callback for when the GATT server receives a response for an
+ * Setup a callback for when the GATT server receives a response for an
* indication event sent previously.
*/
void onConfirmationReceived(EventCallback_t callback) {confirmationReceivedCallback = callback;}
@@ -363,11 +323,15 @@
/* Entry points for the underlying stack to report events back to the user. */
protected:
void handleDataWrittenEvent(const GattWriteCallbackParams *params) {
- dataWrittenCallChain.call(params);
+ if (dataWrittenCallChain.hasCallbacksAttached()) {
+ dataWrittenCallChain.call(params);
+ }
}
void handleDataReadEvent(const GattReadCallbackParams *params) {
- dataReadCallChain.call(params);
+ if (dataReadCallChain.hasCallbacksAttached()) {
+ dataReadCallChain.call(params);
+ }
}
void handleEvent(GattServerEvents::gattEvent_e type, GattAttribute::Handle_t attributeHandle) {
@@ -393,7 +357,9 @@
}
void handleDataSentEvent(unsigned count) {
- dataSentCallChain.call(count);
+ if (dataSentCallChain.hasCallbacksAttached()) {
+ dataSentCallChain.call(count);
+ }
}
protected:
@@ -401,15 +367,15 @@
uint8_t characteristicCount;
private:
- DataSentCallbackChain_t dataSentCallChain;
- DataWrittenCallbackChain_t dataWrittenCallChain;
- DataReadCallbackChain_t dataReadCallChain;
- EventCallback_t updatesEnabledCallback;
- EventCallback_t updatesDisabledCallback;
- EventCallback_t confirmationReceivedCallback;
+ CallChainOfFunctionPointersWithContext<unsigned> dataSentCallChain;
+ CallChainOfFunctionPointersWithContext<const GattWriteCallbackParams *> dataWrittenCallChain;
+ CallChainOfFunctionPointersWithContext<const GattReadCallbackParams *> dataReadCallChain;
+ EventCallback_t updatesEnabledCallback;
+ EventCallback_t updatesDisabledCallback;
+ EventCallback_t confirmationReceivedCallback;
private:
- /* Disallow copy and assignment. */
+ /* disallow copy and assignment */
GattServer(const GattServer &);
GattServer& operator=(const GattServer &);
};