Merge branch 'nd/index-pack-one-fd-per-thread'
Enable threaded index-pack on platforms without thread-unsafe
pread() emulation.
* nd/index-pack-one-fd-per-thread:
index-pack: work around thread-unsafe pread()
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 1bac0f5..87d8dd8 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -40,17 +40,13 @@
int ofs_first, ofs_last;
};
-#if !defined(NO_PTHREADS) && defined(NO_THREAD_SAFE_PREAD)
-/* pread() emulation is not thread-safe. Disable threading. */
-#define NO_PTHREADS
-#endif
-
struct thread_local {
#ifndef NO_PTHREADS
pthread_t thread;
#endif
struct base_data *base_cache;
size_t base_cache_used;
+ int pack_fd;
};
/*
@@ -91,7 +87,8 @@
static unsigned deepest_delta;
static git_SHA_CTX input_ctx;
static uint32_t input_crc32;
-static int input_fd, output_fd, pack_fd;
+static int input_fd, output_fd;
+static const char *curr_pack;
#ifndef NO_PTHREADS
@@ -134,6 +131,7 @@
*/
static void init_thread(void)
{
+ int i;
init_recursive_mutex(&read_mutex);
pthread_mutex_init(&counter_mutex, NULL);
pthread_mutex_init(&work_mutex, NULL);
@@ -141,11 +139,18 @@
pthread_mutex_init(&deepest_delta_mutex, NULL);
pthread_key_create(&key, NULL);
thread_data = xcalloc(nr_threads, sizeof(*thread_data));
+ for (i = 0; i < nr_threads; i++) {
+ thread_data[i].pack_fd = open(curr_pack, O_RDONLY);
+ if (thread_data[i].pack_fd == -1)
+ die_errno(_("unable to open %s"), curr_pack);
+ }
+
threads_active = 1;
}
static void cleanup_thread(void)
{
+ int i;
if (!threads_active)
return;
threads_active = 0;
@@ -154,6 +159,8 @@
pthread_mutex_destroy(&work_mutex);
if (show_stat)
pthread_mutex_destroy(&deepest_delta_mutex);
+ for (i = 0; i < nr_threads; i++)
+ close(thread_data[i].pack_fd);
pthread_key_delete(key);
free(thread_data);
}
@@ -288,13 +295,13 @@
output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
if (output_fd < 0)
die_errno(_("unable to create '%s'"), pack_name);
- pack_fd = output_fd;
+ nothread_data.pack_fd = output_fd;
} else {
input_fd = open(pack_name, O_RDONLY);
if (input_fd < 0)
die_errno(_("cannot open packfile '%s'"), pack_name);
output_fd = -1;
- pack_fd = input_fd;
+ nothread_data.pack_fd = input_fd;
}
git_SHA1_Init(&input_ctx);
return pack_name;
@@ -542,7 +549,7 @@
do {
ssize_t n = (len < 64*1024) ? len : 64*1024;
- n = xpread(pack_fd, inbuf, n, from);
+ n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
if (n < 0)
die_errno(_("cannot pread pack file"));
if (!n)
@@ -1490,7 +1497,7 @@
int cmd_index_pack(int argc, const char **argv, const char *prefix)
{
int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
- const char *curr_pack, *curr_index;
+ const char *curr_index;
const char *index_name = NULL, *pack_name = NULL;
const char *keep_name = NULL, *keep_msg = NULL;
char *index_name_buf = NULL, *keep_name_buf = NULL;
