feat(async): add AsyncFileReadCancel

src/async/AsyncFile.cpp

@@ -6,6 +6,10 @@
 #include <common/Prop.hpp>
 #include <common/Time.hpp>
 
+void DefaultAsyncObjectCleanupCallback(CAsyncObject* object) {
+    AsyncFileReadDestroyObject(object);
+}
+
 CAsyncObject* AsyncFileReadAllocObject() {
     AsyncFileRead::s_queueLock.Enter();
 
@@ -37,6 +41,33 @@ CAsyncObject* AsyncFileReadAllocObject() {
     return object;
 }
 
+int32_t AsyncFileReadCancel(CAsyncObject* object, void (*cleanupCallback)(CAsyncObject* object)) {
+    AsyncFileRead::s_queueLock.Enter();
+
+    if (object->isCurrent) {
+        object->userArg = object;
+
+        if (!cleanupCallback) {
+            cleanupCallback = &DefaultAsyncObjectCleanupCallback;
+        }
+
+        object->userFailedCallback = reinterpret_cast<ASYNC_CALLBACK>(cleanupCallback);
+        object->userPostloadCallback = reinterpret_cast<ASYNC_CALLBACK>(cleanupCallback);
+
+        AsyncFileRead::s_queueLock.Leave();
+
+        return false;
+    }
+
+    SFile::Close(object->file);
+
+    AsyncFileRead::s_asyncFileReadFreeList.LinkToHead(object);
+
+    AsyncFileRead::s_queueLock.Leave();
+
+    return true;
+}
+
 void AsyncFileReadDestroyObject(CAsyncObject* object) {
     AsyncFileRead::s_queueLock.Enter();
 

src/async/AsyncFile.hpp

@@ -5,6 +5,8 @@
 
 CAsyncObject* AsyncFileReadAllocObject();
 
+int32_t AsyncFileReadCancel(CAsyncObject* object, void (*cleanupCallback)(CAsyncObject* object));
+
 void AsyncFileReadDestroyObject(CAsyncObject* object);
 
 void AsyncFileReadInitialize(uint32_t threadSleep, uint32_t handlerTimeout);

src/async/CAsyncObject.hpp

@@ -6,6 +6,8 @@
 class SFile;
 class CAsyncQueue;
 
+typedef void (*ASYNC_CALLBACK)(void*);
+
 class CAsyncObject {
     public:
         // Member variables
@@ -13,8 +15,8 @@ class CAsyncObject {
         void* buffer;
         uint32_t size;
         void* userArg;
-        void (*userPostloadCallback)(void*);
-        void (*userFailedCallback)(void*);
+        ASYNC_CALLBACK userPostloadCallback;
+        ASYNC_CALLBACK userFailedCallback;
         CAsyncQueue* queue;
         void* ptr1C;
         uint8_t priority;