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mdbx: return MDBX_RESULT_TRUE/FALSE from mdbx_env_sync_ex().

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Change-Id: Ia39051ef137df7892181d936e1139ab2a7c94ab4
This commit is contained in:
Leonid Yuriev 2019-09-16 22:23:52 +03:00
parent e03addc8f9
commit 86f2710c2e
1 changed files with 20 additions and 20 deletions
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36
src/elements/core.c
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@ -3179,12 +3179,12 @@ __cold static int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) {
(!env->me_txn0 || env->me_txn0->mt_owner != mdbx_thread_self());
if (outside_txn) {
int rc = mdbx_txn_lock(env, nonblock);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
int err = mdbx_txn_lock(env, nonblock);
if (unlikely(err != MDBX_SUCCESS))
return err;
}
unsigned need_metasync = env->me_flags & MDBX_NOMETASYNC;
int rc = MDBX_RESULT_FALSE /* means "nothing to sync" */;
const MDBX_meta *head = mdbx_meta_head(env);
pgno_t unsynced_pages = *env->me_unsynced_pages;
if (!META_IS_STEADY(head) || unsynced_pages) {
@ -3203,16 +3203,15 @@ __cold static int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) {
mdbx_txn_unlock(env);
/* LY: pre-sync without holding lock to reduce latency for writer(s) */
int rc = (flags & MDBX_WRITEMAP)
int err = (flags & MDBX_WRITEMAP)
? mdbx_msync(&env->me_dxb_mmap, 0, usedbytes, false)
: mdbx_filesync(env->me_fd, MDBX_SYNC_DATA);
need_metasync = 0;
if (unlikely(rc != MDBX_SUCCESS))
return rc;
if (unlikely(err != MDBX_SUCCESS))
return err;
rc = mdbx_txn_lock(env, nonblock);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
err = mdbx_txn_lock(env, nonblock);
if (unlikely(err != MDBX_SUCCESS))
return err;
/* LY: head and unsynced_pages may be changed. */
head = mdbx_meta_head(env);
@ -3220,6 +3219,7 @@ __cold static int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) {
}
env->me_txn0->mt_txnid = meta_txnid(env, head, false);
mdbx_find_oldest(env->me_txn0);
rc = MDBX_RESULT_TRUE /* means "some data was synced" */;
}
if (!META_IS_STEADY(head) ||
@ -3228,20 +3228,19 @@ __cold static int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) {
container_of(head, MDBX_page, mp_data)->mp_pgno,
mdbx_durable_str(head), unsynced_pages);
MDBX_meta meta = *head;
int rc = mdbx_sync_locked(env, flags | MDBX_SHRINK_ALLOWED, &meta);
need_metasync = 0;
if (unlikely(rc != MDBX_SUCCESS)) {
int err = mdbx_sync_locked(env, flags | MDBX_SHRINK_ALLOWED, &meta);
if (unlikely(err != MDBX_SUCCESS)) {
if (outside_txn)
mdbx_txn_unlock(env);
return rc;
return err;
}
rc = MDBX_RESULT_TRUE /* means "some data was synced" */;
}
}
int rc = MDBX_SUCCESS;
/* LY: sync meta-pages if MDBX_NOMETASYNC enabled
* and someone was not synced above. */
if (need_metasync && force)
if (rc == MDBX_RESULT_FALSE && (env->me_flags & MDBX_NOMETASYNC) != 0)
rc = (flags & MDBX_WRITEMAP)
? mdbx_msync(&env->me_dxb_mmap, 0, pgno2bytes(env, NUM_METAS),
false)
@ -7183,10 +7182,11 @@ int __cold mdbx_env_close_ex(MDBX_env *env, int dont_sync) {
* Because in the "owner died" condition kernel don't release
* file lock immediately. */
rc = mdbx_env_sync_ex(env, true, false);
rc = (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc;
#else
rc = mdbx_env_sync_ex(env, true, true);
rc = (rc == MDBX_BUSY || rc == EAGAIN || rc == EACCES || rc == EBUSY ||
rc == EWOULDBLOCK)
rc == EWOULDBLOCK || rc == MDBX_RESULT_TRUE)
? MDBX_SUCCESS
: rc;
#endif