Rewrite all file IO for more performance

The new `git_filebuf` structure provides atomic high-performance writes
to disk by using a write cache, and optionally a double-buffered scheme
through a worker thread (not enabled yet).

Writes can be done 3-layered, like in git.git (user code -> write cache
-> disk), or 2-layered, by writing directly on the cache. This makes
index writing considerably faster.

The `git_filebuf` structure contains all the old functionality of
`git_filelock` for atomic file writes and reads. The `git_filelock`
structure has been removed.

Additionally, the `git_filebuf` API allows to automatically hash (SHA1)
all the data as it is written to disk (hashing is done smartly on big
chunks to improve performance).

Signed-off-by: Vicent Marti <tanoku@gmail.com>

1 files changed, 0 insertions, 23 deletions

diff --git a/src/filelock.h b/src/filelock.h
deleted file mode 100644
index bff861811..000000000
--- a/src/filelock.h
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef INCLUDE_filelock_h__
-#define INCLUDE_filelock_h__
-
-#include "fileops.h"
-
-struct git_filelock {
-
-	char path[GIT_PATH_MAX];
-	size_t path_length;
-
-	git_file file_lock;
-	int is_locked;
-};
-
-typedef struct git_filelock git_filelock;
-
-int git_filelock_init(git_filelock *lock, const char *path);
-int git_filelock_lock(git_filelock *lock, int append);
-void git_filelock_unlock(git_filelock *lock);
-int git_filelock_commit(git_filelock *lock);
-int git_filelock_write(git_filelock *lock, const void *buffer, size_t length);
-
-#endif