X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Fdrv%2Fvterm.c;h=01612dc7fe910122a28f773bdd15cd76d21041e3;hb=015f48988e0ff398409d71dfc692005ab439490a;hp=aed92582e3b8e836a8fc99c136f6f9b0599a7131;hpb=001546477549f71fd1af08e13c60e0a39397532a;p=tpg%2Facess2.git

diff --git a/KernelLand/Kernel/drv/vterm.c b/KernelLand/Kernel/drv/vterm.c
index aed92582..01612dc7 100644
--- a/KernelLand/Kernel/drv/vterm.c
+++ b/KernelLand/Kernel/drv/vterm.c
@@ -35,10 +35,10 @@ extern void	Debug_SetKTerminal(const char *File);
 // === PROTOTYPES ===
  int	VT_Install(char **Arguments);
  int	VT_ReadDir(tVFS_Node *Node, int Pos, char Dest[FILENAME_MAX]);
-tVFS_Node	*VT_FindDir(tVFS_Node *Node, const char *Name);
+tVFS_Node	*VT_FindDir(tVFS_Node *Node, const char *Name, Uint Flags);
  int	VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data);
-size_t	VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer);
-size_t	VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer);
+size_t	VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags);
+size_t	VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags);
  int	VT_Terminal_IOCtl(tVFS_Node *Node, int Id, void *Data);
 void	VT_Terminal_Reference(tVFS_Node *Node);
 void	VT_Terminal_Close(tVFS_Node *Node);
@@ -285,7 +285,7 @@ int VT_ReadDir(tVFS_Node *Node, int Pos, char Dest[FILENAME_MAX])
  * \param Node	Root node
  * \param Name	Name (number) of the terminal
  */
-tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name)
+tVFS_Node *VT_FindDir(tVFS_Node *Node, const char *Name, Uint Flags)
 {
 	 int	num;
 	
@@ -354,12 +354,13 @@ int VT_Root_IOCtl(tVFS_Node *Node, int Id, void *Data)
 /**
  * \brief Read from a virtual terminal
  */
-size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
+size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags)
 {
-	 int	pos, avail;
+	 int	pos, avail, rv;
 	tVTerm	*term = &gVT_Terminals[ Node->Inode ];
 	Uint32	*codepoint_buf = Buffer;
 	Uint32	*codepoint_in;
+	tTime	timeout_zero = 0;
 	
 	Mutex_Acquire( &term->ReadingLock );
 	
@@ -370,7 +371,12 @@ size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 	case TERM_MODE_TEXT:
 		VT_int_UpdateCursor(term, 1);
 	
-		VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UTF-8)");
+		rv = VFS_SelectNode(Node, VFS_SELECT_READ,
+			(Flags & VFS_IOFLAG_NOBLOCK ? &timeout_zero : NULL), "VT_Read (UTF-8)");
+		if(!rv) {
+			errno = (Flags & VFS_IOFLAG_NOBLOCK) ? EWOULDBLOCK : EINTR;
+			return -1;
+		}
 		
 		avail = term->InputWrite - term->InputRead;
 		if(avail < 0)
@@ -392,7 +398,12 @@ size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 	//case TERM_MODE_FB:
 	// Other - UCS-4
 	default:
-		VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "VT_Read (UCS-4)");
+		rv = VFS_SelectNode(Node, VFS_SELECT_READ,
+			(Flags & VFS_IOFLAG_NOBLOCK ? &timeout_zero : NULL), "VT_Read (UCS-4)");
+		if(!rv) {
+			errno = (Flags & VFS_IOFLAG_NOBLOCK) ? EWOULDBLOCK : EINTR;
+			return -1;
+		}
 		
 		avail = term->InputWrite - term->InputRead;
 		if(avail < 0)
@@ -433,7 +444,7 @@ size_t VT_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
 /**
  * \brief Write to a virtual terminal
  */
-size_t VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer)
+size_t VT_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags)
 {
 	tVTerm	*term = &gVT_Terminals[ Node->Inode ];
 	 int	size;
@@ -737,11 +748,10 @@ void VT_SetTerminal(int ID)
 			gpVT_CurTerm->Buffer = malloc( gpVT_CurTerm->Width*gpVT_CurTerm->Height*4 );
 		if( gpVT_CurTerm->Width < giVT_RealWidth )
 		{
-			 int	line;
 			Uint	ofs = 0;
 			Uint32	*dest = gpVT_CurTerm->Buffer;
 			// Slower scanline copy
-			for( line = 0; line < gpVT_CurTerm->Height; line ++ )
+			for( int line = 0; line < gpVT_CurTerm->Height; line ++ )
 			{
 				VFS_ReadAt(giVT_OutputDevHandle, ofs, gpVT_CurTerm->Width*4, dest);
 				ofs += giVT_RealWidth * 4;
@@ -755,6 +765,7 @@ void VT_SetTerminal(int ID)
 				gpVT_CurTerm->Buffer
 				);
 		}
+		LOG("Cached screen contents");
 	}
 
 	// Update current terminal ID