Kernel/IPStack - Added lock to buffer structure so drivers can do async Tx

diff --git a/KernelLand/Modules/IPStack/buffer.c b/KernelLand/Modules/IPStack/buffer.c
index 0048420..2555a63 100644 (file)
--- a/KernelLand/Modules/IPStack/buffer.c
+++ b/KernelLand/Modules/IPStack/buffer.c
@@ -14,6 +14,8 @@ struct sIPStackBuffer
         int    MaxSubBufffers;
         int    nSubBuffers;
        size_t  TotalLength;
+       tMutex  lBufferLock;
+
        struct _subbuffer
        {
                const void      *Data;
@@ -34,12 +36,14 @@ tIPStackBuffer *IPStack_Buffer_CreateBuffer(int MaxBuffers)
        ret->MaxSubBufffers = MaxBuffers;
        ret->nSubBuffers = 0;
        ret->TotalLength = 0;
+       memset(&ret->lBufferLock, 0, sizeof(ret->lBufferLock));
        memset(ret->SubBuffers, 0, MaxBuffers * sizeof(ret->SubBuffers[0]));
        return ret;
 }
 
 void IPStack_Buffer_ClearBuffer(tIPStackBuffer *Buffer)
 {
+       IPStack_Buffer_LockBuffer(Buffer);
        for( int i = 0; i < Buffer->nSubBuffers; i ++ )
        {
                if( Buffer->SubBuffers[i].Cb == NULL )
@@ -51,8 +55,8 @@ void IPStack_Buffer_ClearBuffer(tIPStackBuffer *Buffer)
                        Buffer->SubBuffers[i].Data
                        );
        }
-       // TODO: Fire callbacks?
        Buffer->nSubBuffers = 0;
+       IPStack_Buffer_UnlockBuffer(Buffer);
 }
 
 void IPStack_Buffer_DestroyBuffer(tIPStackBuffer *Buffer)
@@ -62,6 +66,15 @@ void IPStack_Buffer_DestroyBuffer(tIPStackBuffer *Buffer)
        free(Buffer);
 }
 
+void IPStack_Buffer_LockBuffer(tIPStackBuffer *Buffer)
+{
+       Mutex_Acquire(&Buffer->lBufferLock);
+}
+void IPStack_Buffer_UnlockBuffer(tIPStackBuffer *Buffer)
+{
+       Mutex_Release(&Buffer->lBufferLock);
+}
+
 void IPStack_Buffer_AppendSubBuffer(tIPStackBuffer *Buffer,
        size_t HeaderLen, size_t FooterLen, const void *Data,
        tIPStackBufferCb Cb, void *Arg

diff --git a/KernelLand/Modules/IPStack/include/buffer.h b/KernelLand/Modules/IPStack/include/buffer.h
index ad0516a..749fc18 100644 (file)
--- a/KernelLand/Modules/IPStack/include/buffer.h
+++ b/KernelLand/Modules/IPStack/include/buffer.h
@@ -67,5 +67,8 @@ extern int    IPStack_Buffer_GetBuffer(tIPStackBuffer *Buffer, int PrevID, size_t *
  */
 extern void    *IPStack_Buffer_CompactBuffer(tIPStackBuffer *Buffer, size_t *Length);
 
+extern void    IPStack_Buffer_LockBuffer(tIPStackBuffer *Buffer);
+extern void    IPStack_Buffer_UnlockBuffer(tIPStackBuffer *Buffer);
+
 #endif