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[v3,1/6] bulk-checkin: rename 'state' variable and separate 'plugged' boolean

Message ID d5893e28df152ce9b843d4709ed9349156633b3d.1631590725.git.gitgitgadget@gmail.com (mailing list archive)
State New, archived
Headers show
Series Implement a batched fsync option for core.fsyncObjectFiles | expand

Commit Message

Neeraj Singh (WINDOWS-SFS) Sept. 14, 2021, 3:38 a.m. UTC 
From: Neeraj Singh <neerajsi@microsoft.com>

Preparation for adding bulk-fsync to the bulk-checkin.c infrastructure.

* Rename 'state' variable to 'bulk_checkin_state', since we will later
  be adding 'bulk_fsync_state'.  This also makes the variable easier to
  find in the debugger, since the name is more unique.

* Move the 'plugged' data member of 'bulk_checkin_state' into a separate
  static variable. Doing this avoids resetting the variable in
  finish_bulk_checkin when zeroing the 'bulk_checkin_state'. As-is, we
  seem to unintentionally disable the plugging functionality the first
  time a new packfile must be created due to packfile size limits. While
  disabling the plugging state only results in suboptimal behavior for
  the current code, it would be fatal for the bulk-fsync functionality
  later in this patch series.

Signed-off-by: Neeraj Singh <neerajsi@microsoft.com>
---
 bulk-checkin.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)
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Patch

diff --git a/bulk-checkin.c b/bulk-checkin.c
index b023d9959aa..f117d62c908 100644
--- a/bulk-checkin.c
+++ b/bulk-checkin.c
@@ -10,9 +10,9 @@ 
 #include "packfile.h"
 #include "object-store.h"
 
-static struct bulk_checkin_state {
-	unsigned plugged:1;
+static int bulk_checkin_plugged;
 
+static struct bulk_checkin_state {
 	char *pack_tmp_name;
 	struct hashfile *f;
 	off_t offset;
@@ -21,7 +21,7 @@  static struct bulk_checkin_state {
 	struct pack_idx_entry **written;
 	uint32_t alloc_written;
 	uint32_t nr_written;
-} state;
+} bulk_checkin_state;
 
 static void finish_bulk_checkin(struct bulk_checkin_state *state)
 {
@@ -260,21 +260,23 @@  int index_bulk_checkin(struct object_id *oid,
 		       int fd, size_t size, enum object_type type,
 		       const char *path, unsigned flags)
 {
-	int status = deflate_to_pack(&state, oid, fd, size, type,
+	int status = deflate_to_pack(&bulk_checkin_state, oid, fd, size, type,
 				     path, flags);
-	if (!state.plugged)
-		finish_bulk_checkin(&state);
+	if (!bulk_checkin_plugged)
+		finish_bulk_checkin(&bulk_checkin_state);
 	return status;
 }
 
 void plug_bulk_checkin(void)
 {
-	state.plugged = 1;
+	assert(!bulk_checkin_plugged);
+	bulk_checkin_plugged = 1;
 }
 
 void unplug_bulk_checkin(void)
 {
-	state.plugged = 0;
-	if (state.f)
-		finish_bulk_checkin(&state);
+	assert(bulk_checkin_plugged);
+	bulk_checkin_plugged = 0;
+	if (bulk_checkin_state.f)
+		finish_bulk_checkin(&bulk_checkin_state);
 }