X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Fdrv%2Ffifo.c;h=1e6fcdb73d3b0c120e3bbb6138f302fc648f4a31;hb=b0da731b2d89b9dd58de2c98eaf6218a41a21920;hp=f957d2851145295930a102f3c6ea9eede82182ad;hpb=6dbb27af1a9f92781ae5eb898f83b78fe3a0e004;p=tpg%2Facess2.git

diff --git a/KernelLand/Kernel/drv/fifo.c b/KernelLand/Kernel/drv/fifo.c
index f957d285..1e6fcdb7 100644
--- a/KernelLand/Kernel/drv/fifo.c
+++ b/KernelLand/Kernel/drv/fifo.c
@@ -280,6 +280,7 @@ size_t FIFO_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 		
 		// Mark some flags
 		if( pipe->ReadPos == pipe->WritePos ) {
+			LOG("%i == %i, marking none to read", pipe->ReadPos, pipe->WritePos);
 			VFS_MarkAvaliable(Node, 0);
 		}
 		VFS_MarkFull(Node, 0);	// Buffer can't still be full
@@ -315,9 +316,12 @@ size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buff
 	while(remaining)
 	{
 		// Wait for buffer to empty
-		if(pipe->Flags & PF_BLOCKING) {
-			if( pipe->ReadPos == (pipe->WritePos+1)%pipe->BufSize )
+		if(pipe->Flags & PF_BLOCKING)
+		{
+			if( pipe->ReadPos == (pipe->WritePos+1)%pipe->BufSize ) {
+				LOG("Blocking write on FIFO");
 				VFS_SelectNode(Node, VFS_SELECT_WRITE, NULL, "FIFO_Write");
+			}
 
 			len = remaining;
 			if( pipe->ReadPos > pipe->WritePos )
@@ -349,11 +353,14 @@ size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buff
 		if(len > pipe->BufSize - pipe->WritePos)
 		{
 			int ofs = pipe->BufSize - pipe->WritePos;
+			LOG("pipe->Buffer = %p, pipe->WritePos = %i, ofs=%i, len=%i",
+				pipe->Buffer, pipe->WritePos, ofs, len);
 			memcpy(&pipe->Buffer[pipe->WritePos], Buffer, ofs);
-			memcpy(&pipe->Buffer, (Uint8*)Buffer + ofs, len-ofs);
+			memcpy(&pipe->Buffer[0], (Uint8*)Buffer + ofs, len-ofs);
 		}
 		else
 		{
+			LOG("pipe->Buffer = %p, pipe->WritePos = %i", pipe->Buffer, pipe->WritePos);
 			memcpy(&pipe->Buffer[pipe->WritePos], Buffer, len);
 		}
 		
@@ -363,6 +370,7 @@ size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buff
 		
 		// Mark some flags
 		if( pipe->ReadPos == pipe->WritePos ) {
+			LOG("Buffer is full");
 			VFS_MarkFull(Node, 1);	// Buffer full
 		}
 		VFS_MarkAvaliable(Node, 1);
@@ -393,7 +401,7 @@ tPipe *FIFO_Int_NewPipe(int Size, const char *Name)
 	ret = calloc(1, allocsize);
 	if(!ret)	LEAVE_RET('n', NULL);
 	
-	// Clear Return
+	// Set default flags
 	ret->Flags = PF_BLOCKING;
 	
 	// Allocate Buffer