Merge branch 'ps/reftable-portability'

Update reftable library part with what is used in libgit2 to improve
portability to different target codebases and platforms.

* ps/reftable-portability:
  reftable/system: add abstraction to mmap files
  reftable/system: add abstraction to retrieve time in milliseconds
  reftable/fsck: use REFTABLE_UNUSED instead of UNUSED
  reftable/stack: provide fsync(3p) via system header
  reftable: introduce "reftable-system.h" header

1 files changed, 28 insertions, 4 deletions

diff --git a/reftable/system.h b/reftable/system.h
index c54ed4cad6..c0e2cbe0ff 100644
--- a/reftable/system.h
+++ b/reftable/system.h
@@ -9,11 +9,14 @@
 #ifndef SYSTEM_H
 #define SYSTEM_H
 
-/* This header glues the reftable library to the rest of Git */
+/*
+ * This header defines the platform-agnostic interface that is to be
+ * implemented by the project to make it work on their respective supported
+ * systems, and to integrate it into the project itself. This header is not
+ * expected to be changed by the individual project.
+ */
 
-#define MINGW_DONT_HANDLE_IN_USE_ERROR
-#include "compat/posix.h"
-#include "compat/zlib-compat.h"
+#include "reftable-system.h"
 
 /*
  * Return a random 32 bit integer. This function is expected to return
@@ -108,4 +111,25 @@ int flock_release(struct reftable_flock *l);
  */
 int flock_commit(struct reftable_flock *l);
 
+/* Report the time in milliseconds. */
+uint64_t reftable_time_ms(void);
+
+struct reftable_mmap {
+       void *data;
+       size_t size;
+       void *priv;
+};
+
+/*
+ * Map the file into memory. Returns 0 on success, a reftable error code on
+ * error.
+ */
+int reftable_mmap(struct reftable_mmap *out, int fd, size_t len);
+
+/*
+ * Unmap the file from memory. Returns 0 on success, a reftable error code on
+ * error.
+ */
+int reftable_munmap(struct reftable_mmap *mmap);
+
 #endif