Fix bugs in the resource manager.

research/ma_engine.h

@@ -412,9 +412,11 @@ MA_API ma_result ma_resource_manager_data_source_get_looping(ma_resource_manager
 
 /* Job management. */
 MA_API ma_result ma_resource_manager_post_job(ma_resource_manager* pResourceManager, const ma_job* pJob);
+MA_API ma_result ma_resource_manager_post_job_quit(ma_resource_manager* pResourceManager);  /* Helper for posting a quit job. */
 MA_API ma_result ma_resource_manager_next_job(ma_resource_manager* pResourceManager, ma_job* pJob);
 MA_API ma_result ma_resource_manager_process_job(ma_resource_manager* pResourceManager, ma_job* pJob);
 
+
 /*
 Engine
 ======
@@ -848,9 +850,10 @@ MA_API ma_result ma_job_queue_init(ma_uint32 flags, ma_job_queue* pQueue)
     just a dummy item for giving us the first item in the list which is stored in the "next" member.
     */
     ma_slot_allocator_alloc(&pQueue->allocator, &pQueue->head);  /* Will never fail. */
+    pQueue->jobs[ma_job_extract_slot(pQueue->head)].next = MA_JOB_ID_NONE;
     pQueue->tail = pQueue->head;
 
-    pQueue->jobs[pQueue->head].next = MA_JOB_ID_NONE;
+    
 
     return MA_SUCCESS;
 }
@@ -900,8 +903,8 @@ MA_API ma_result ma_job_queue_post(ma_job_queue* pQueue, const ma_job* pJob)
         tail = pQueue->tail;
         next = pQueue->jobs[ma_job_extract_slot(tail)].next;
 
-        if (tail == pQueue->tail) {
-            if (next == MA_JOB_ID_NONE) {
+        if (ma_job_toc_to_allocation(tail) == ma_job_toc_to_allocation(pQueue->tail)) {
+            if (ma_job_extract_slot(next) == 0xFFFF) {
                 if (c89atomic_compare_and_swap_64(&pQueue->jobs[ma_job_extract_slot(tail)].next, next, slot) == next) {
                     break;
                 }
@@ -942,9 +945,9 @@ MA_API ma_result ma_job_queue_next(ma_job_queue* pQueue, ma_job* pJob)
         tail = pQueue->tail;
         next = pQueue->jobs[ma_job_extract_slot(head)].next;
 
-        if (head == pQueue->head) {
-            if (head == tail) {
-                if (next == MA_JOB_ID_NONE) {
+        if (ma_job_toc_to_allocation(head) == ma_job_toc_to_allocation(pQueue->head)) {
+            if (ma_job_toc_to_allocation(head) == ma_job_toc_to_allocation(tail)) {
+                if (ma_job_extract_slot(next) == 0xFFFF) {
                     return MA_NO_DATA_AVAILABLE;
                 }
                 c89atomic_compare_and_swap_64(&pQueue->tail, tail, next);
@@ -1545,7 +1548,6 @@ static void ma_resource_manager_delete_all_data_buffers(ma_resource_manager* pRe
 
 MA_API void ma_resource_manager_uninit(ma_resource_manager* pResourceManager)
 {
-    ma_job quitJob;
     ma_uint32 iJobThread;
 
     if (pResourceManager == NULL) {
@@ -1556,8 +1558,7 @@ MA_API void ma_resource_manager_uninit(ma_resource_manager* pResourceManager)
     Job threads need to be killed first. To do this we need to post a quit message to the message queue and then wait for the thread. The quit message will never be removed from the
     queue which means it will never not be returned after being encounted for the first time which means all threads will eventually receive it.
     */
-    quitJob = ma_job_init(MA_JOB_QUIT);
-    ma_resource_manager_post_job(pResourceManager, &quitJob);
+    ma_resource_manager_post_job_quit(pResourceManager);
 
     /* Wait for every job to finish before continuing to ensure nothing is sill trying to access any of our objects below. */
     for (iJobThread = 0; iJobThread < pResourceManager->config.jobThreadCount; iJobThread += 1) {
@@ -2545,7 +2546,7 @@ static ma_result ma_resource_manager_data_source_map(ma_data_source* pDataSource
         }
     }
 
-    /* The frame cursor is increment in unmap(). */
+    /* The frame cursor is incremented in unmap(). */
     return ma_data_source_map(ma_resource_manager_data_source_get_buffer_connector(pRMDataSource), ppFramesOut, pFrameCount);
 }
 
@@ -2920,6 +2921,12 @@ MA_API ma_result ma_resource_manager_post_job(ma_resource_manager* pResourceMana
     return ma_job_queue_post(&pResourceManager->jobQueue, pJob);
 }
 
+MA_API ma_result ma_resource_manager_post_job_quit(ma_resource_manager* pResourceManager)
+{
+    ma_job job = ma_job_init(MA_JOB_QUIT);
+    return ma_resource_manager_post_job(pResourceManager, &job);
+}
+
 MA_API ma_result ma_resource_manager_next_job(ma_resource_manager* pResourceManager, ma_job* pJob)
 {
     if (pResourceManager == NULL) {
@@ -2934,6 +2941,11 @@ static ma_result ma_resource_manager_process_job__load_data_buffer(ma_resource_m
 {
     ma_result result = MA_SUCCESS;
     ma_resource_manager_data_buffer* pDataBuffer;
+    ma_decoder* pDecoder = NULL;       /* Malloc'd here, and then free'd on the last page decode. */
+    ma_uint64 totalFrameCount = 0;
+    void* pData = NULL;
+    ma_uint64 dataSizeInBytes = 0;
+    ma_uint64 framesRead = 0;   /* <-- Keeps track of how many frames we read for the first page. */
 
     MA_ASSERT(pResourceManager != NULL);
     MA_ASSERT(pJob             != NULL);
@@ -2956,7 +2968,6 @@ static ma_result ma_resource_manager_process_job__load_data_buffer(ma_resource_m
 
     if (pDataBuffer->data.type == ma_resource_manager_data_buffer_encoding_encoded) {
         /* No decoding. Just store the file contents in memory. */
-        void* pData;
         size_t sizeInBytes;
 
         result = ma_vfs_open_and_read_file_ex(pResourceManager->config.pVFS, pJob->loadDataBuffer.pFilePath, &pData, &sizeInBytes, &pResourceManager->config.allocationCallbacks, MA_ALLOCATION_TYPE_ENCODED_BUFFER);
@@ -2966,15 +2977,9 @@ static ma_result ma_resource_manager_process_job__load_data_buffer(ma_resource_m
         }
     } else  {
         /* Decoding. */
-        ma_decoder* pDecoder;       /* Malloc'd here, and then free'd on the last page decode. */
         ma_decoder_config config;
-        ma_uint64 totalFrameCount;
-        void* pData;
-        ma_uint64 dataSizeInBytes;
         ma_uint64 dataSizeInFrames;
         ma_uint64 pageSizeInFrames;
-        ma_uint64 framesRead;   /* <-- Keeps track of how many frames we read for the first page. */
-        ma_job pageDataBufferJob;
 
         /*
         With the file initialized we now need to initialize the decoder. We need to pass this decoder around on the job queue so we'll need to
@@ -3056,11 +3061,41 @@ static ma_result ma_resource_manager_process_job__load_data_buffer(ma_resource_m
             c89atomic_thread_fence(c89atomic_memory_order_acquire);
             pDataBuffer->data.decoded.decodedFrameCount = framesRead;
 
+            ma_decoder_uninit(pDecoder);
             ma__free_from_callbacks(pDecoder, &pResourceManager->config.allocationCallbacks/*, MA_ALLOCATION_TYPE_DECODER*/);
+
             result = MA_SUCCESS;
             goto done;
         } else {
+            /* We've still got more to decode. We just set the result to MA_BUSY which will tell the next section below to post a paging event. */
+            result = MA_BUSY;
+        }
+    }
+
+done:
+    ma__free_from_callbacks(pJob->loadDataBuffer.pFilePath, &pResourceManager->config.allocationCallbacks/*, MA_ALLOCATION_TYPE_TRANSIENT_STRING*/);
+
+    /*
+    We need to set the result to at the very end to ensure no other threads try reading the data before we've fully initialized the object. Other threads
+    are going to be inspecting this variable to determine whether or not they're ready to read data. We can only change the result if it's set to MA_BUSY
+    because otherwise we may be changing away from an error code which would be bad. An example is if the application creates a data buffer, but then
+    immediately deletes it before we've got to this point. In this case, pDataBuffer->result will be MA_UNAVAILABLE, and setting it to MA_SUCCESS or any
+    other error code would cause the buffer to look like it's in a state that it's not.
+    */
+    c89atomic_compare_and_swap_32(&pDataBuffer->result, MA_BUSY, result);
+
+    /*
+    If our result is MA_BUSY we need to post a job to start loading. It's important that we do this after setting the result to the buffer so that the
+    decoding process happens at the right time. If we don't, there's a window where the MA_JOB_PAGE_DATA_BUFFER event will see a status of something
+    other than MA_BUSY and then abort the decoding process with an error.
+    */
+    if (result == MA_BUSY && pDecoder != NULL) {
         /* We've still got more to decode. We need to post a job to continue decoding. */
+        ma_job pageDataBufferJob;
+
+        MA_ASSERT(pDecoder != NULL);
+        MA_ASSERT(pData    != NULL);
+
         pageDataBufferJob = ma_job_init(MA_JOB_PAGE_DATA_BUFFER);
         pageDataBufferJob.order                            = ma_resource_manager_data_buffer_next_execution_order(pDataBuffer);
         pageDataBufferJob.pageDataBuffer.pDataBuffer       = pDataBuffer;
@@ -3107,19 +3142,6 @@ static ma_result ma_resource_manager_process_job__load_data_buffer(ma_resource_m
         /* We want to make sure we don't signal the event here. It needs to be delayed until the last page. */
         pJob->loadDataBuffer.pEvent = NULL;
     }
-    }
-
-done:
-    ma__free_from_callbacks(pJob->loadDataBuffer.pFilePath, &pResourceManager->config.allocationCallbacks/*, MA_ALLOCATION_TYPE_TRANSIENT_STRING*/);
-
-    /*
-    We need to set the result to at the very end to ensure no other threads try reading the data before we've fully initialized the object. Other threads
-    are going to be inspecting this variable to determine whether or not they're ready to read data. We can only change the result if it's set to MA_BUSY
-    because otherwise we may be changing away from an error code which would be bad. An example is if the application creates a data buffer, but then
-    immediately deletes it before we've got to this point. In this case, pDataBuffer->result will be MA_UNAVAILABLE, and setting it to MA_SUCCESS or any
-    other error code would cause the buffer to look like it's in a state that it's not.
-    */
-    c89atomic_compare_and_swap_32(&pDataBuffer->result, MA_BUSY, result);
 
     /* Only signal the other threads after the result has been set just for cleanliness sake. */
     if (pJob->loadDataBuffer.pEvent != NULL) {

research/ma_mixing.h

@@ -2510,6 +2510,10 @@ static ma_result ma_mixer_mix_data_source_mmap(ma_mixer* pMixer, ma_data_source*
         if (pEffect == NULL) {
             /* Fast path. Mix directly from the data source and don't bother applying an effect. */
             result = ma_data_source_map(pDataSource, &pMappedBuffer, &framesToProcess);
+            if (result != MA_SUCCESS) {
+                break;  /* Failed to map. Abort. */
+            }
+
             if (framesToProcess == 0) {
                 break;  /* Wasn't able to map any data. Abort. */
             }