From 7ece906598fff75ea0d0b73b7158c077e6654698 Mon Sep 17 00:00:00 2001
From: Edward Thomson <ethomson@edwardthomson.com>
Date: Mon, 3 Apr 2017 23:07:16 +0100
Subject: [PATCH] win32: make posix emulation retries configurable

POSIX emulation retries should be configurable so that tests can disable
them.  In particular, maniacally threading tests may end up trying to
open locked files and need retries, which will slow continuous
integration tests significantly.
---
 src/win32/posix.h     | 1 +
 src/win32/posix_w32.c | 3 ++-
 tests/threads/diff.c  | 8 ++++++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/win32/posix.h b/src/win32/posix.h
index 0ba05a16f..64769ecd3 100644
--- a/src/win32/posix.h
+++ b/src/win32/posix.h
@@ -15,6 +15,7 @@
 #include "dir.h"
 
 extern unsigned long git_win32__createfile_sharemode;
+extern int git_win32__retries;
 
 typedef SOCKET GIT_SOCKET;
 
diff --git a/src/win32/posix_w32.c b/src/win32/posix_w32.c
index 874892eb6..bf132966d 100644
--- a/src/win32/posix_w32.c
+++ b/src/win32/posix_w32.c
@@ -37,6 +37,7 @@ typedef DWORD(WINAPI *PFGetFinalPathNameByHandleW)(HANDLE, LPWSTR, DWORD, DWORD)
 
 unsigned long git_win32__createfile_sharemode =
  FILE_SHARE_READ | FILE_SHARE_WRITE;
+int git_win32__retries = 10;
 
 GIT_INLINE(void) set_errno(void)
 {
@@ -162,7 +163,7 @@ GIT_INLINE(bool) last_error_retryable(void)
 #define do_with_retries(fn, cleanup) \
 	do {                                                             \
 		int __tries, __ret;                                          \
-		for (__tries = 0; __tries < 10; __tries++) {                 \
+		for (__tries = 0; __tries < git_win32__retries; __tries++) { \
 			if (__tries && (__ret = (cleanup)) != 0)                 \
 				return __ret;                                        \
 			if ((__ret = (fn)) != GIT_RETRY)                         \
diff --git a/tests/threads/diff.c b/tests/threads/diff.c
index c32811469..92fd7061b 100644
--- a/tests/threads/diff.c
+++ b/tests/threads/diff.c
@@ -19,12 +19,20 @@ static git_repository *_repo;
 static git_tree *_a, *_b;
 static git_atomic _counts[4];
 static int _check_counts;
+static int _retries;
 
 #define THREADS 20
 
+void test_threads_diff__initialize(void)
+{
+	_retries = git_win32__retries;
+	git_win32__retries = 1;
+}
+
 void test_threads_diff__cleanup(void)
 {
 	cl_git_sandbox_cleanup();
+	git_win32__retries = _retries;
 }
 
 static void setup_trees(void)