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Generalize the SpinLock and move it to AK.

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Add a separate lock to protect the VFS. I think this might be a good idea.
I'm not sure it's a good approach though. I'll fiddle with it as I go along.

It's really fun to figure out all these things on my own.
This commit is contained in:
Andreas Kling 2018-10-23 23:32:53 +02:00
parent e4bfcd2346
commit 018da1be11
11 changed files with 88 additions and 203 deletions
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17
VirtualFileSystem/VirtualFileSystem.cpp
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@ -20,9 +20,18 @@ VirtualFileSystem& VirtualFileSystem::the()
return *s_the;
}
static SpinLock* s_vfsLock;
SpinLock& VirtualFileSystem::lock()
{
ASSERT(s_vfsLock);
return *s_vfsLock;
}
void VirtualFileSystem::initializeGlobals()
{
s_the = nullptr;
s_vfsLock = new SpinLock;
FileSystem::initializeGlobals();
}
@ -336,6 +345,8 @@ void VirtualFileSystem::listDirectoryRecursively(const String& path)
bool VirtualFileSystem::touch(const String& path)
{
Locker locker(VirtualFileSystem::lock());
auto inode = resolvePath(path);
if (!inode.isValid())
return false;
@ -344,6 +355,8 @@ bool VirtualFileSystem::touch(const String& path)
OwnPtr<FileHandle> VirtualFileSystem::open(const String& path)
{
Locker locker(VirtualFileSystem::lock());
auto inode = resolvePath(path);
if (!inode.isValid())
return nullptr;
@ -355,6 +368,8 @@ OwnPtr<FileHandle> VirtualFileSystem::open(const String& path)
OwnPtr<FileHandle> VirtualFileSystem::create(const String& path)
{
Locker locker(VirtualFileSystem::lock());
// FIXME: Do the real thing, not just this fake thing!
(void) path;
m_rootNode->fileSystem()->createInode(m_rootNode->fileSystem()->rootInode(), "empty", 0100644, 0);
@ -363,6 +378,8 @@ OwnPtr<FileHandle> VirtualFileSystem::create(const String& path)
OwnPtr<FileHandle> VirtualFileSystem::mkdir(const String& path)
{
Locker locker(VirtualFileSystem::lock());
// FIXME: Do the real thing, not just this fake thing!
(void) path;
m_rootNode->fileSystem()->makeDirectory(m_rootNode->fileSystem()->rootInode(), "mydir", 0400755);