void VFS_RestoreHandles(int NumFDs, void *Handles)
{
tVFS_Handle *handles = Handles;
int i;
// NULL = nothing to do
if( !Handles )
return ;
// Check if there is already a set of handles
if( MM_GetPhysAddr( gaUserHandles ) != 0 )
return ;
// Allocate user handle area
{
Uint addr, size;
int max_handles = *Threads_GetMaxFD();
size = max_handles * sizeof(tVFS_Handle);
for(addr = 0; addr < size; addr += 0x1000)
{
if( !MM_Allocate( (tVAddr)gaUserHandles + addr ) )
{
Warning("OOM - VFS_AllocHandle");
Threads_Exit(0, 0xFF); // Terminate user
}
}
memset( gaUserHandles, 0, size );
}
// Restore handles
memcpy( gaUserHandles, handles, NumFDs * sizeof(tVFS_Handle) );
// Reference when copied
for( i = 0; i < NumFDs; i ++ )
{
tVFS_Handle *h = &handles[i];
if( !h->Node )
continue ;
_ReferenceNode(h->Node);
h->Mount->OpenHandleCount ++;
}
}
int VFS_AllocHandle(int bIsUser, tVFS_Node *Node, int Mode)
{
// Check for a user open
if(bIsUser)
{
int max_handles = *Threads_GetMaxFD(NULL);
// Allocate Buffer
if( MM_GetPhysAddr( gaUserHandles ) == 0 )
{
tPage *pageptr = (void*)gaUserHandles;
size_t size = max_handles * sizeof(tVFS_Handle);
for( size_t ofs = 0; ofs < size; ofs ++)
{
if( !MM_Allocate( pageptr ) )
{
Warning("OOM - VFS_AllocHandle");
Threads_Exit(0, 0xFF); // Terminate user
}
pageptr ++;
}
memset( gaUserHandles, 0, size );
}
// Get a handle
for( int i = 0; i < max_handles; i ++ )
{
if(gaUserHandles[i].Node) continue;
gaUserHandles[i].Node = Node;
gaUserHandles[i].Position = 0;
gaUserHandles[i].Mode = Mode;
return i;
}
}
else
{
// Allocate space if not already
if( MM_GetPhysAddr( gaKernelHandles ) == 0 )
{
tPage *pageptr = (void*)gaKernelHandles;
size_t size = MAX_KERNEL_FILES * sizeof(tVFS_Handle);
for(size_t ofs = 0; ofs < size; ofs += size)
{
if( !MM_Allocate( pageptr ) )
{
Panic("OOM - VFS_AllocHandle");
}
pageptr ++;
}
memset( gaKernelHandles, 0, size );
}
// Get a handle
for(int i=0;i<MAX_KERNEL_FILES;i++)
{
if(gaKernelHandles[i].Node) continue;
gaKernelHandles[i].Node = Node;
gaKernelHandles[i].Position = 0;
gaKernelHandles[i].Mode = Mode;
return i|VFS_KERNEL_FLAG;
}
}
return -1;
}
void VFS_RestoreHandles(int NumFDs, void *Handles)
{
tVFS_Handle *handles = Handles;
const int max_handles = *Threads_GetMaxFD(NULL);
// NULL = nothing to do
if( !Handles )
return ;
if( NumFDs > max_handles ) {
Log_Notice("VFS", "RestoreHandles: Capping from %i FDs to %i", NumFDs, max_handles);
NumFDs = max_handles;
}
// Allocate user handle area (and dereference existing handles)
for( int i = 0; i < NumFDs; i ++ )
{
tVFS_Handle *h = &gaUserHandles[i];
if( !MM_GetPhysAddr(h) )
{
void *pg = (void*)( (tVAddr)h & ~(PAGE_SIZE-1) );
if( !MM_Allocate( pg ) )
{
// OOM?
return ;
}
memset(pg, 0, PAGE_SIZE);
}
// Safe to dereference, as Threads_CloneTCB references handles
#if 1
else
{
if(h->Node)
{
_CloseNode(h->Node);
h->Mount->OpenHandleCount --;
}
}
#endif
}
// Clean up existing
// Restore handles
memcpy( gaUserHandles, handles, NumFDs * sizeof(tVFS_Handle) );
// Reference when copied
for( int i = 0; i < NumFDs; i ++ )
{
tVFS_Handle *h = &gaUserHandles[i];
if( !h->Node )
continue ;
// Debug("VFS_RestoreHandles: %i %p", i, h->Node);
_ReferenceNode(h->Node);
h->Mount->OpenHandleCount ++;
}
for( int i = NumFDs; i < max_handles; i ++ )
{
gaUserHandles[i].Node = NULL;
}
}
int VFS_AllocHandle(int bIsUser, tVFS_Node *Node, int Mode)
{
// Check for a user open
if(bIsUser)
{
int max_handles = *Threads_GetMaxFD();
// Allocate Buffer
if( MM_GetPhysAddr( gaUserHandles ) == 0 )
{
Uint addr, size;
size = max_handles * sizeof(tVFS_Handle);
for(addr = 0; addr < size; addr += 0x1000)
{
if( !MM_Allocate( (tVAddr)gaUserHandles + addr ) )
{
Warning("OOM - VFS_AllocHandle");
Threads_Exit(0, 0xFF); // Terminate user
}
}
memset( gaUserHandles, 0, size );
}
// Get a handle
for( int i = 0; i < max_handles; i ++ )
{
if(gaUserHandles[i].Node) continue;
gaUserHandles[i].Node = Node;
gaUserHandles[i].Position = 0;
gaUserHandles[i].Mode = Mode;
return i;
}
}
else
{
// Allocate space if not already
if( MM_GetPhysAddr( gaKernelHandles ) == 0 )
{
Uint addr, size;
size = MAX_KERNEL_FILES * sizeof(tVFS_Handle);
for(addr = 0; addr < size; addr += 0x1000)
{
if( !MM_Allocate( (tVAddr)gaKernelHandles + addr ) )
{
Panic("OOM - VFS_AllocHandle");
Threads_Exit(0, 0xFF); // Terminate application (get some space back)
}
}
memset( gaKernelHandles, 0, size );
}
// Get a handle
for(int i=0;i<MAX_KERNEL_FILES;i++)
{
if(gaKernelHandles[i].Node) continue;
gaKernelHandles[i].Node = Node;
gaKernelHandles[i].Position = 0;
gaKernelHandles[i].Mode = Mode;
return i|VFS_KERNEL_FLAG;
}
}
return -1;
}
