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mdbx: remove creation obsolete legacy checkpoints.

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Change-Id: I2d88b5ef4853d9379188fc450e87e11b28754c75
This commit is contained in:
Leonid Yuriev 2019-12-01 16:43:48 +03:00
parent 2b5eec2295
commit ed986ecbb5
2 changed files with 10 additions and 20 deletions
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28
src/elements/core.c
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@ -2107,6 +2107,8 @@ static __must_check_result int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp);
static __must_check_result int mdbx_page_loose(MDBX_txn *txn, MDBX_page *mp);
static int mdbx_page_alloc(MDBX_cursor *mc, unsigned num, MDBX_page **mp,
int flags);
static txnid_t mdbx_oomkick(MDBX_env *env, const txnid_t laggard);
static int mdbx_page_new(MDBX_cursor *mc, uint32_t flags, unsigned num,
MDBX_page **mp);
static int mdbx_page_touch(MDBX_cursor *mc);
@ -2372,8 +2374,6 @@ const char *mdbx_strerror_ANSI2OEM(int errnum) {
}
#endif /* Bit of madness for Windows */
static txnid_t mdbx_oomkick(MDBX_env *env, const txnid_t laggard);
void __cold mdbx_debug_log(int level, const char *function, int line,
const char *fmt, ...) {
va_list args;
@ -3374,7 +3374,7 @@ static __inline uint64_t mdbx_meta_sign(const MDBX_meta *meta) {
return (sign > MDBX_DATASIGN_WEAK) ? sign : ~sign;
}
enum meta_choise_mode { prefer_last, prefer_noweak, prefer_steady };
enum meta_choise_mode { prefer_last, prefer_steady };
static __inline bool mdbx_meta_ot(const enum meta_choise_mode mode,
const MDBX_env *env, const MDBX_meta *a,
@ -3395,15 +3395,10 @@ static __inline bool mdbx_meta_ot(const enum meta_choise_mode mode,
return META_IS_STEADY(b);
/* fall through */
__fallthrough;
case prefer_noweak:
if (META_IS_WEAK(a) != META_IS_WEAK(b))
return !META_IS_WEAK(b);
/* fall through */
__fallthrough;
case prefer_last:
mdbx_jitter4testing(true);
if (txnid_a == txnid_b)
return META_IS_STEADY(b) || (META_IS_WEAK(a) && !META_IS_WEAK(b));
return META_IS_STEADY(b);
return txnid_a < txnid_b;
}
}
@ -3494,12 +3489,10 @@ static __hot txnid_t mdbx_recent_steady_txnid(const MDBX_env *env) {
}
static const char *mdbx_durable_str(const MDBX_meta *const meta) {
if (META_IS_WEAK(meta))
return "Weak";
if (META_IS_STEADY(meta))
return (meta->mm_datasync_sign == mdbx_meta_sign(meta)) ? "Steady"
: "Tainted";
return "Legacy";
return "Weak";
}
/*----------------------------------------------------------------------------*/
@ -7316,16 +7309,17 @@ static int __cold mdbx_read_header(MDBX_env *env, MDBX_meta *dest,
if (rc != MDBX_SUCCESS)
continue;
if (mdbx_meta_ot(prefer_noweak, env, dest, meta)) {
if (mdbx_meta_ot(prefer_steady, env, dest, meta)) {
*dest = *meta;
if (META_IS_WEAK(dest))
if (!META_IS_STEADY(dest))
loop_limit += 1; /* LY: should re-read to hush race with update */
mdbx_verbose("latch meta[%u]", meta_number);
}
}
if (dest->mm_psize == 0 ||
(META_IS_WEAK(dest) && !meta_weak_acceptable(env, dest, lck_exclusive))) {
(!META_IS_STEADY(dest) &&
!meta_weak_acceptable(env, dest, lck_exclusive))) {
mdbx_error("%s", "no usable meta-pages, database is corrupted");
return rc;
}
@ -7531,9 +7525,7 @@ static int mdbx_sync_locked(MDBX_env *env, unsigned flags,
*env->me_sync_timestamp = mdbx_osal_monotime();
} else {
assert(rc == MDBX_RESULT_TRUE /* carry non-steady */);
pending->mm_datasync_sign = F_ISSET(env->me_flags, MDBX_UTTERLY_NOSYNC)
? MDBX_DATASIGN_NONE
: MDBX_DATASIGN_WEAK;
pending->mm_datasync_sign = MDBX_DATASIGN_WEAK;
}
MDBX_meta *target = nullptr;

2
src/elements/internals.h
View File

@ -305,9 +305,7 @@ typedef struct MDBX_meta {
#define MDBX_DATASIGN_NONE 0u
#define MDBX_DATASIGN_WEAK 1u
#define SIGN_IS_WEAK(sign) ((sign) == MDBX_DATASIGN_WEAK)
#define SIGN_IS_STEADY(sign) ((sign) > MDBX_DATASIGN_WEAK)
#define META_IS_WEAK(meta) SIGN_IS_WEAK((meta)->mm_datasync_sign)
#define META_IS_STEADY(meta) SIGN_IS_STEADY((meta)->mm_datasync_sign)
volatile uint64_t mm_datasync_sign;