RGBCube/serenity
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Add primitive FIFO and hook it up to sys$pipe().

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It's now possible to do this in bash:

cat kernel.map | fgrep List

This is very cool! :^)
This commit is contained in:
Andreas Kling 2018-11-12 01:28:46 +01:00
parent 18e3ddf605
commit f1404aa948
13 changed files with 305 additions and 22 deletions
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12
VirtualFileSystem/FileDescriptor.h
View file

@ -2,7 +2,9 @@
#include "VirtualFileSystem.h"
#include "InodeMetadata.h"
#include "FIFO.h"
#include <AK/ByteBuffer.h>
#include <AK/CircularQueue.h>
#include <AK/Retainable.h>
#ifdef SERENITY
@ -12,6 +14,8 @@ class TTY;
class FileDescriptor : public Retainable<FileDescriptor> {
public:
static RetainPtr<FileDescriptor> create(RetainPtr<VirtualFileSystem::Node>&&);
static RetainPtr<FileDescriptor> create_pipe_writer(FIFO&);
static RetainPtr<FileDescriptor> create_pipe_reader(FIFO&);
~FileDescriptor();
RetainPtr<FileDescriptor> clone();
@ -24,6 +28,7 @@ public:
int stat(Unix::stat*);
bool hasDataAvailableForRead();
bool can_write();
ssize_t get_dir_entries(byte* buffer, Unix::size_t);
@ -52,6 +57,9 @@ public:
dword fd_flags() const { return m_fd_flags; }
int set_fd_flags(dword flags) { m_fd_flags = flags; return 0; }
bool is_fifo() const { return m_fifo; }
FIFO::Direction fifo_direction() { return m_fifo_direction; }
#endif
ByteBuffer& generatorCache() { return m_generatorCache; }
@ -59,6 +67,7 @@ public:
private:
friend class VirtualFileSystem;
explicit FileDescriptor(RetainPtr<VirtualFileSystem::Node>&&);
FileDescriptor(FIFO&, FIFO::Direction);
RetainPtr<VirtualFileSystem::Node> m_vnode;
@ -70,6 +79,9 @@ private:
bool m_isBlocking { true };
dword m_fd_flags { 0 };
dword m_file_flags { 0 };
RetainPtr<FIFO> m_fifo;
FIFO::Direction m_fifo_direction { FIFO::Neither };
#endif
};