-/* AcessOS
- * FIFO Pipe Driver
+/*
+ * Acess2 Kernel
+ * - By John Hodge (thePowersGang)
+ *
+ * drv/fifo.c
+ * - FIFO Pipe Driver
*/
#define DEBUG 0
#include <acess.h>
int FIFO_Install(char **Arguments);
int FIFO_IOCtl(tVFS_Node *Node, int Id, void *Data);
int FIFO_ReadDir(tVFS_Node *Node, int Id, char Dest[FILENAME_MAX]);
-tVFS_Node *FIFO_FindDir(tVFS_Node *Node, const char *Filename);
+tVFS_Node *FIFO_FindDir(tVFS_Node *Node, const char *Filename, Uint Flags);
tVFS_Node *FIFO_MkNod(tVFS_Node *Node, const char *Name, Uint Flags);
void FIFO_Reference(tVFS_Node *Node);
void FIFO_Close(tVFS_Node *Node);
int FIFO_Unlink(tVFS_Node *Node, const char *OldName);
-size_t FIFO_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer);
-size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer);
+size_t FIFO_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags);
+size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags);
tPipe *FIFO_Int_NewPipe(int Size, const char *Name);
// === GLOBALS ===
* \brief Find a file in the FIFO root
* \note Creates an anon pipe if anon is requested
*/
-tVFS_Node *FIFO_FindDir(tVFS_Node *Node, const char *Filename)
+tVFS_Node *FIFO_FindDir(tVFS_Node *Node, const char *Filename, Uint Flags)
{
tPipe *tmp;
if(!Filename) return NULL;
if(Filename[0] == '\0') return NULL;
// Anon Pipe
- if(Filename[0] == 'a' && Filename[1] == 'n'
- && Filename[2] == 'o' && Filename[3] == 'n'
- && Filename[4] == '\0') {
+ if( strcmp(Filename, "anon") == 0 )
+ {
+ if( Flags & VFS_FDIRFLAG_STAT ) {
+ //return &gFIFI_TemplateAnonNode;
+ }
tmp = FIFO_Int_NewPipe(DEFAULT_RING_SIZE, "anon");
return &tmp->Node;
}
/**
* \brief Read from a fifo pipe
*/
-size_t FIFO_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer)
+size_t FIFO_Read(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags)
{
tPipe *pipe = Node->ImplPtr;
Uint len;
while(remaining)
{
// Wait for buffer to fill
- if(pipe->Flags & PF_BLOCKING)
+ if( (pipe->Flags & PF_BLOCKING) && !(Flags & VFS_IOFLAG_NOBLOCK) )
{
if( pipe->ReadPos == pipe->WritePos )
VFS_SelectNode(Node, VFS_SELECT_READ, NULL, "FIFO_Read");
// 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
/**
* \brief Write to a fifo pipe
*/
-size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer)
+size_t FIFO_Write(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags)
{
tPipe *pipe = Node->ImplPtr;
Uint len;
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) && !(Flags & VFS_IOFLAG_NOBLOCK) )
+ {
+ 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 )
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);
}
// Mark some flags
if( pipe->ReadPos == pipe->WritePos ) {
+ LOG("Buffer is full");
VFS_MarkFull(Node, 1); // Buffer full
}
VFS_MarkAvaliable(Node, 1);
return Length;
}
-// --- HELPERS ---
+// --- HeLPERS ---
/**
* \fn tPipe *FIFO_Int_NewPipe(int Size, const char *Name)
* \brief Create a new pipe
tPipe *ret;
int namelen = strlen(Name) + 1;
int allocsize = sizeof(tPipe) + sizeof(tVFS_ACL) + Size + namelen;
-
+
+ ENTER("iSize sName", Size, Name);
+
ret = calloc(1, allocsize);
- if(!ret) return NULL;
+ if(!ret) LEAVE_RET('n', NULL);
- // Clear Return
+ // Set default flags
ret->Flags = PF_BLOCKING;
// Allocate Buffer
ret->Node.GID = Threads_GetGID();
ret->Node.NumACLs = 1;
ret->Node.ACLs = (void*)( (Uint)ret + sizeof(tPipe) );
- ret->Node.ACLs->Group = 0;
- ret->Node.ACLs->ID = ret->Node.UID;
- ret->Node.ACLs->Inv = 0;
- ret->Node.ACLs->Perms = -1;
+ ret->Node.ACLs->Ent.Group = 0;
+ ret->Node.ACLs->Ent.ID = ret->Node.UID;
+ ret->Node.ACLs->Perm.Inv = 0;
+ ret->Node.ACLs->Perm.Perms = -1;
ret->Node.CTime
= ret->Node.MTime
= ret->Node.ATime = now();
ret->Node.Type = &gFIFO_PipeNodeType;
+
+ LEAVE('p', ret);
return ret;
}