refs: implement simple transactions for the packed-refs file

diff --git a/run-command.c b/run-command.c
index 765c2ce0567ad0d75270283397d63eac3674c01a..aece872e331caa28bf515c98f5cceb27d8414dff 100644 (file)
--- a/run-command.c
+++ b/run-command.c
@@ -72,7 +72,7 @@ static inline void close_pair(int fd[2])
        close(fd[1]);
 }
 
-#ifndef WIN32
+#ifndef GIT_WINDOWS_NATIVE
 static inline void dup_devnull(int to)
 {
        int fd = open("/dev/null", O_RDWR);
@@ -159,7 +159,7 @@ static const char **prepare_shell_cmd(const char **argv)
                die("BUG: shell command is empty");
 
        if (strcspn(argv[0], "|&;<>()$`\\\"' \t\n*?[#~=%") != strlen(argv[0])) {
-#ifndef WIN32
+#ifndef GIT_WINDOWS_NATIVE
                nargv[nargc++] = SHELL_PATH;
 #else
                nargv[nargc++] = "sh";
@@ -182,7 +182,7 @@ static const char **prepare_shell_cmd(const char **argv)
        return nargv;
 }
 
-#ifndef WIN32
+#ifndef GIT_WINDOWS_NATIVE
 static int execv_shell_cmd(const char **argv)
 {
        const char **nargv = prepare_shell_cmd(argv);
@@ -193,7 +193,7 @@ static int execv_shell_cmd(const char **argv)
 }
 #endif
 
-#ifndef WIN32
+#ifndef GIT_WINDOWS_NATIVE
 static int child_err = 2;
 static int child_notifier = -1;
 
@@ -334,7 +334,7 @@ int start_command(struct child_process *cmd)
        trace_argv_printf(cmd->argv, "trace: run_command:");
        fflush(NULL);
 
-#ifndef WIN32
+#ifndef GIT_WINDOWS_NATIVE
 {
        int notify_pipe[2];
        if (pipe(notify_pipe))
@@ -588,6 +588,7 @@ int run_command_v_opt_cd_env(const char **argv, int opt, const char *dir, const
 static pthread_t main_thread;
 static int main_thread_set;
 static pthread_key_t async_key;
+static pthread_key_t async_die_counter;
 
 static void *run_thread(void *data)
 {
@@ -614,6 +615,14 @@ static NORETURN void die_async(const char *err, va_list params)
 
        exit(128);
 }
+
+static int async_die_is_recursing(void)
+{
+       void *ret = pthread_getspecific(async_die_counter);
+       pthread_setspecific(async_die_counter, (void *)1);
+       return ret != NULL;
+}
+
 #endif
 
 int start_async(struct async *async)
@@ -695,7 +704,9 @@ int start_async(struct async *async)
                main_thread_set = 1;
                main_thread = pthread_self();
                pthread_key_create(&async_key, NULL);
+               pthread_key_create(&async_die_counter, NULL);
                set_die_routine(die_async);
+               set_die_is_recursing_routine(async_die_is_recursing);
        }
 
        if (proc_in >= 0)