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mdbx: using enum instead of #define for flags/modes.

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Resolve https://github.com/erthink/libmdbx/issues/108

Change-Id: I45897300375d2b5b9361aaba81dadcf9801fe3cf
This commit is contained in:
Leonid Yuriev
2020-07-08 02:26:46 +03:00
parent 2e0d2e65af
commit 9720ed39f5
8 changed files with 955 additions and 743 deletions
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26
src/internals.h
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@@ -195,10 +195,6 @@ extern LIBMDBX_API const char *const mdbx_sourcery_anchor;
#define MAIN_DBI 1
/* Number of DBs in metapage (free and main) - also hardcoded elsewhere */
#define CORE_DBS 2
#define MAX_DBI (INT16_MAX - CORE_DBS)
#if MAX_DBI != MDBX_MAX_DBI
#error "Oops, MAX_DBI != MDBX_MAX_DBI"
#endif
/* Number of meta pages - also hardcoded elsewhere */
#define NUM_METAS 3
@@ -1379,3 +1375,25 @@ static __pure_function __always_inline __maybe_unused size_t
ceil_powerof2(size_t value, size_t granularity) {
return floor_powerof2(value + granularity - 1, granularity);
}
/* Only a subset of the mdbx_env flags can be changed
* at runtime. Changing other flags requires closing the
* environment and re-opening it with the new flags. */
#define ENV_CHANGEABLE_FLAGS \
(MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | MDBX_MAPASYNC | MDBX_NOMEMINIT | \
MDBX_COALESCE | MDBX_PAGEPERTURB | MDBX_ACCEDE)
#define ENV_CHANGELESS_FLAGS \
(MDBX_NOSUBDIR | MDBX_RDONLY | MDBX_WRITEMAP | MDBX_NOTLS | MDBX_NORDAHEAD | \
MDBX_LIFORECLAIM | MDBX_EXCLUSIVE)
#define ENV_USABLE_FLAGS (ENV_CHANGEABLE_FLAGS | ENV_CHANGELESS_FLAGS)
static __maybe_unused void static_checks(void) {
STATIC_ASSERT_MSG(INT16_MAX - CORE_DBS == MDBX_MAX_DBI,
"Oops, MDBX_MAX_DBI or CORE_DBS?");
STATIC_ASSERT_MSG((MDBX_ACCEDE | MDBX_CREATE) ==
((DB_USABLE_FLAGS | DB_INTERNAL_FLAGS) &
(ENV_USABLE_FLAGS | ENV_INTERNAL_FLAGS)),
"Oops, some flags overlapped or wrong");
STATIC_ASSERT_MSG((ENV_INTERNAL_FLAGS & ENV_USABLE_FLAGS) == 0,
"Oops, some flags overlapped or wrong");
}