Revisions to System::Layer (project-chip#8267)

* Revisions to System::Layer #### Problem `System::Layer` has redundancy in event configuration, and a confusingly-named grab-bag namespace `System::Platform::Layer` This is a standalone fragment of work toward event/threading refactoring, issue project-chip#7725. #### Change overview - Merge `CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE` with `CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE`, and `CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE` with `CHIP_SYSTEM_CONFIG_EVENT_TYPE`, since they serve the same purpose in LwIP and non-LwIP implementations respectively. - Remove some dead configuration code. - Move event functions from the `System::Platform::Layer` namespace (not the same kind of ‘layer’ as `System::Layer`) to a specific `System::Platform::EventSupport` namespace. - Move (Will|Did)(Init|Shutdown) functions from the `System::Platform::Layer` namespace up to `System::Platform`. #### Testing No functional changes, only renaming and pruning. * restyle * zap regen
nikita-s-wrk · Sep 23, 2021 · 0fec8e4 · 0fec8e4
1 parent 1cc84fa
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diff --git a/src/include/platform/PlatformManager.h b/src/include/platform/PlatformManager.h
@@ -25,22 +25,9 @@
 
 #include <platform/CHIPDeviceBuildConfig.h>
 #include <platform/CHIPDeviceEvent.h>
+#include <system/SystemLayer.h>
 
 namespace chip {
-namespace System {
-namespace Platform {
-namespace Layer {
-
-CHIP_ERROR PostEvent(System::Layer & aLayer, void * aContext, System::Object & aTarget, System::EventType aType,
-                     uintptr_t aArgument);
-CHIP_ERROR DispatchEvents(System::Layer & aLayer, void * aContext);
-CHIP_ERROR DispatchEvent(System::Layer & aLayer, void * aContext, System::Event aEvent);
-CHIP_ERROR StartTimer(System::Layer & aLayer, void * aContext, uint32_t aMilliseconds);
-
-} // namespace Layer
-} // namespace Platform
-} // namespace System
-
 namespace DeviceLayer {
 
 class PlatformManagerImpl;
@@ -183,14 +170,14 @@ class PlatformManager
     template <class>
     friend class Internal::GenericConfigurationManagerImpl;
     // Parentheses used to fix clang parsing issue with these declarations
-    friend ::CHIP_ERROR(::chip::System::Platform::Layer::PostEvent)(::chip::System::Layer & aLayer, void * aContext,
-                                                                    ::chip::System::Object & aTarget,
-                                                                    ::chip::System::EventType aType, uintptr_t aArgument);
-    friend ::CHIP_ERROR(::chip::System::Platform::Layer::DispatchEvents)(::chip::System::Layer & aLayer, void * aContext);
-    friend ::CHIP_ERROR(::chip::System::Platform::Layer::DispatchEvent)(::chip::System::Layer & aLayer, void * aContext,
-                                                                        ::chip::System::Event aEvent);
-    friend ::CHIP_ERROR(::chip::System::Platform::Layer::StartTimer)(::chip::System::Layer & aLayer, void * aContext,
-                                                                     uint32_t aMilliseconds);
+    friend ::CHIP_ERROR(::chip::System::Platform::EventSupport::PostEvent)(::chip::System::Layer & aLayer, void * aContext,
+                                                                           ::chip::System::Object & aTarget,
+                                                                           ::chip::System::EventType aType, uintptr_t aArgument);
+    friend ::CHIP_ERROR(::chip::System::Platform::EventSupport::DispatchEvents)(::chip::System::Layer & aLayer, void * aContext);
+    friend ::CHIP_ERROR(::chip::System::Platform::EventSupport::DispatchEvent)(::chip::System::Layer & aLayer, void * aContext,
+                                                                               ::chip::System::Event aEvent);
+    friend ::CHIP_ERROR(::chip::System::Platform::EventSupport::StartTimer)(::chip::System::Layer & aLayer, void * aContext,
+                                                                            uint32_t aMilliseconds);
 
     void PostEvent(const ChipDeviceEvent * event);
     void DispatchEvent(const ChipDeviceEvent * event);

diff --git a/src/platform/EFR32/SystemPlatformConfig.h b/src/platform/EFR32/SystemPlatformConfig.h
@@ -35,8 +35,7 @@ struct ChipDeviceEvent;
 
 // ==================== Platform Adaptations ====================
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 // ========== Platform-specific Configuration Overrides =========
 

diff --git a/src/platform/ESP32/SystemPlatformConfig.h b/src/platform/ESP32/SystemPlatformConfig.h
@@ -38,8 +38,7 @@ struct ChipDeviceEvent;
 
 // ==================== Platform Adaptations ====================
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 // ==================== General Configuration Overrides ====================
 

diff --git a/src/platform/K32W/SystemPlatformConfig.h b/src/platform/K32W/SystemPlatformConfig.h
@@ -36,8 +36,7 @@ struct ChipDeviceEvent;
 
 // ==================== Platform Adaptations ====================
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 // ========== Platform-specific Configuration Overrides =========
 

diff --git a/src/platform/SystemEventSupport.cpp b/src/platform/SystemEventSupport.cpp
@@ -30,7 +30,7 @@
 namespace chip {
 namespace System {
 namespace Platform {
-namespace Layer {
+namespace EventSupport {
 
 using namespace ::chip::DeviceLayer;
 
@@ -62,7 +62,7 @@ CHIP_ERROR DispatchEvent(System::Layer & aLayer, void * aContext, const ChipDevi
     return CHIP_NO_ERROR;
 }
 
-} // namespace Layer
+} // namespace EventSupport
 } // namespace Platform
 } // namespace System
 } // namespace chip
diff --git a/src/platform/SystemTimerSupport.cpp b/src/platform/SystemTimerSupport.cpp
@@ -30,7 +30,7 @@
 namespace chip {
 namespace System {
 namespace Platform {
-namespace Layer {
+namespace EventSupport {
 
 using namespace ::chip::DeviceLayer;
 
@@ -39,7 +39,7 @@ CHIP_ERROR StartTimer(System::Layer & aLayer, void * aContext, uint32_t aMillise
     return PlatformMgr().StartChipTimer(aMilliseconds);
 }
 
-} // namespace Layer
+} // namespace EventSupport
 } // namespace Platform
 } // namespace System
 } // namespace chip
diff --git a/src/platform/cc13x2_26x2/SystemPlatformConfig.h b/src/platform/cc13x2_26x2/SystemPlatformConfig.h
@@ -35,8 +35,7 @@ struct ChipDeviceEvent;
 
 // ==================== Platform Adaptations ====================
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 // ========== Platform-specific Configuration Overrides =========
 

diff --git a/src/platform/mbed/SystemPlatformConfig.h b/src/platform/mbed/SystemPlatformConfig.h
@@ -40,8 +40,7 @@ struct ChipDeviceEvent;
 #define CHIP_SYSTEM_CONFIG_MBED_LOCKING 1
 #define CHIP_SYSTEM_CONFIG_NO_LOCKING 0
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 // ========== Platform-specific Configuration Overrides =========
 

diff --git a/src/platform/qpg/SystemPlatformConfig.h b/src/platform/qpg/SystemPlatformConfig.h
@@ -34,8 +34,7 @@ struct ChipDeviceEvent;
 
 // ==================== Platform Adaptations ====================
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 // ========== Platform-specific Configuration Overrides =========
 

diff --git a/src/system/SystemConfig.h b/src/system/SystemConfig.h
@@ -359,30 +359,6 @@
 #ifndef CHIP_SYSTEM_CONFIG_PACKETBUFFER_CAPACITY_MAX
 #define CHIP_SYSTEM_CONFIG_PACKETBUFFER_CAPACITY_MAX 1583
 #endif /* CHIP_SYSTEM_CONFIG_PACKETBUFFER_CAPACITY_MAX */
-#endif /* !CHIP_SYSTEM_CONFIG_USE_LWIP */
-
-#if CHIP_SYSTEM_CONFIG_USE_LWIP
-
-/**
- *  @def CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE
- *
- *  @brief
- *      This defines the type for CHIP System Layer event types, typically an integral type.
- */
-#ifndef CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE int
-#endif /* CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE */
-
-/**
- *  @def CHIP_SYSTEM_CONFIG_LWIP_EVENT_UNRESERVED_CODE
- *
- *  @brief
- *      This defines the first number in the default event code space not reserved for use by the CHIP System Layer.
- *      Event codes used by each layer must not overlap.
- */
-#ifndef CHIP_SYSTEM_CONFIG_LWIP_EVENT_UNRESERVED_CODE
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_UNRESERVED_CODE  32
-#endif /* CHIP_SYSTEM_CONFIG_LWIP_EVENT_UNRESERVED_CODE */
 
 /**
  *  @def _CHIP_SYSTEM_CONFIG_LWIP_EVENT
@@ -395,16 +371,30 @@
 #define _CHIP_SYSTEM_CONFIG_LWIP_EVENT(e) (e)
 #endif /* _CHIP_SYSTEM_CONFIG_LWIP_EVENT */
 
+#endif /* !CHIP_SYSTEM_CONFIG_USE_LWIP */
+
+/**
+ *  @def CHIP_SYSTEM_CONFIG_EVENT_TYPE
+ *
+ *  @brief
+ *      This defines the type for CHIP System Layer event types, typically an integral type.
+ */
+#ifndef CHIP_SYSTEM_CONFIG_EVENT_TYPE
+#define CHIP_SYSTEM_CONFIG_EVENT_TYPE int
+#endif /* CHIP_SYSTEM_CONFIG_EVENT_TYPE */
+
 /**
- *  @def CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE
+ *  @def CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE
  *
  *  @brief
- *      This defines the type of CHIP System Layer event objects or "messages" for the LwIP dispatcher.
+ *      This defines the type of CHIP System Layer event objects or "messages".
  *
  *      Such types are not directly used by the CHIP System Layer but are "passed through". Consequently a forward declaration and
  *      a const pointer or reference are appropriate.
  */
-#ifndef CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE
+#ifndef CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE
+
+#if CHIP_SYSTEM_CONFIG_USE_LWIP
 namespace chip {
 namespace System {
 
@@ -413,20 +403,41 @@ struct LwIPEvent;
 } // namespace System
 } // namespace chip
 
-#define CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE const struct chip::System::LwIPEvent*
-#endif /* CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE */
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct chip::System::LwIPEvent*
+
+#else /* CHIP_SYSTEM_CONFIG_USE_LWIP */
+
+#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
 
 #endif /* CHIP_SYSTEM_CONFIG_USE_LWIP */
 
+#endif /* CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE */
+
+#if CHIP_SYSTEM_CONFIG_USE_LWIP
+
+/**
+ *  @def _CHIP_SYSTEM_CONFIG_LWIP_EVENT
+ *
+ *  @brief
+ *      This defines a mapping function for CHIP System Layer codes for describing the types of events for the LwIP dispatcher,
+ *      which allows mapping such event types into a platform- or system-specific range.
+ */
+#ifndef _CHIP_SYSTEM_CONFIG_LWIP_EVENT
+#define _CHIP_SYSTEM_CONFIG_LWIP_EVENT(e) (e)
+#endif /* _CHIP_SYSTEM_CONFIG_LWIP_EVENT */
+
+#endif /* CHIP_SYSTEM_CONFIG_USE_LWIP */
+
+
 /**
  *  @def CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_XTOR_FUNCTIONS
  *
  *  @brief
  *      This defines whether (1) or not (0) your platform will provide the following platform-specific functions:
- *      - chip::System::Platform::Layer::WillInit
- *      - chip::System::Platform::Layer::WillShutdown
- *      - chip::System::Platform::Layer::DidInit
- *      - chip::System::Platform::Layer::DidShutdown
+ *      - chip::System::Platform::WillInit
+ *      - chip::System::Platform::WillShutdown
+ *      - chip::System::Platform::DidInit
+ *      - chip::System::Platform::DidShutdown
  */
 #ifndef CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_XTOR_FUNCTIONS
 #define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_XTOR_FUNCTIONS 0

diff --git a/src/system/SystemEvent.h b/src/system/SystemEvent.h
@@ -36,16 +36,14 @@ struct ChipDeviceEvent;
 namespace chip {
 namespace System {
 
-#if CHIP_SYSTEM_CONFIG_USE_LWIP
-
 /**
  *  @typedef EventType
  *  The basic type for all InetLayer events.
  *
  *  This is defined to a platform- or system-specific type.
  *
  */
-typedef CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE EventType;
+typedef CHIP_SYSTEM_CONFIG_EVENT_TYPE EventType;
 
 /**
  *  @typedef Event
@@ -54,7 +52,9 @@ typedef CHIP_SYSTEM_CONFIG_LWIP_EVENT_TYPE EventType;
  *  This is defined to a platform- or system-specific type.
  *
  */
-typedef CHIP_SYSTEM_CONFIG_LWIP_EVENT_OBJECT_TYPE Event;
+typedef CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE Event;
+
+#if CHIP_SYSTEM_CONFIG_USE_LWIP
 
 /**
  *   The Inet layer event type definitions.
@@ -66,46 +66,6 @@ enum
     kEvent_ScheduleWork = _CHIP_SYSTEM_CONFIG_LWIP_EVENT(1), /**< The event for scheduling work on the System Layer's thread. */
 };
 
-/**
- *  Check to verify if an EventType is a valid one.
- *
- *  @param[in]  aEventType  CHIP System Layer event type.
- *
- *  @return true if it falls within the enumerated range; otherwise, false.
- */
-static inline bool IsEventOfType(EventType aEventType)
-{
-    return (aEventType >= kEvent_ReleaseObj && aEventType <= kEvent_ScheduleWork);
-}
-
-#else
-
-#ifndef CHIP_SYSTEM_CONFIG_EVENT_TYPE
-#define CHIP_SYSTEM_CONFIG_EVENT_TYPE int
-#endif
-
-#ifndef CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE
-#define CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE const struct ::chip::DeviceLayer::ChipDeviceEvent *
-#endif
-
-/**
- *  @typedef EventType
- *  The basic type for all InetLayer events.
- *
- *  This is defined to a platform- or system-specific type.
- *
- */
-typedef CHIP_SYSTEM_CONFIG_EVENT_TYPE EventType;
-
-/**
- *  @typedef Event
- *  The basic object for all InetLayer events.
- *
- *  This is defined to a platform- or system-specific type.
- *
- */
-typedef CHIP_SYSTEM_CONFIG_EVENT_OBJECT_TYPE Event;
-
 #endif // CHIP_SYSTEM_CONFIG_USE_LWIP
 
 } // namespace System