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mdbx-windows: more for running under Wine.

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Wine unable create mapped-view large tran secton size.

More for https://github.com/erthink/libmdbx/issues/83

Change-Id: I93e98d58a827c785f8257cd9cac387a333e59621
This commit is contained in:
Leonid Yuriev 2020-02-24 20:46:36 +03:00
parent fbf55e17cb
commit 6248b67f75
2 changed files with 10 additions and 2 deletions
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9
src/elements/core.c
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@ -4662,6 +4662,8 @@ static __cold int mdbx_mapresize(MDBX_env *env, const pgno_t used_pgno,
* the local threads for safe remap.
* 2) At least on Windows 10 1803 the entire mapped section is unavailable
* for short time during NtExtendSection() or VirtualAlloc() execution.
* 3) Under Wine runtime environment on Linux a section extending is not
* supported. Therefore thread suspending is always required.
*
* THEREFORE LOCAL THREADS SUSPENDING IS ALWAYS REQUIRED! */
array_onstack.limit = ARRAY_LENGTH(array_onstack.handles);
@ -6062,7 +6064,12 @@ static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) {
}
if (txn->mt_flags & MDBX_RDONLY) {
#if defined(_WIN32) || defined(_WIN64)
if (size > env->me_dbgeo.lower && env->me_dbgeo.shrink) {
if ((size > env->me_dbgeo.lower && env->me_dbgeo.shrink) ||
(mdbx_RunningUnderWine() &&
/* under Wine acquisition of remap_guard is always required,
* since Wine don't support section extending,
* i.e. in both cases unmap+map are required. */
size < env->me_dbgeo.upper && env->me_dbgeo.grow)) {
txn->mt_flags |= MDBX_SHRINK_ALLOWED;
mdbx_srwlock_AcquireShared(&env->me_remap_guard);
}

3
src/elements/osal.c
View File

@ -1300,7 +1300,8 @@ MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map,
if (!NT_SUCCESS(err))
return ntstatus2errcode(err);
SIZE_T ViewSize = (flags & MDBX_RDONLY) ? 0 : limit;
SIZE_T ViewSize =
(flags & MDBX_RDONLY) ? 0 : mdbx_RunningUnderWine() ? size : limit;
err = NtMapViewOfSection(
map->section, GetCurrentProcess(), &map->address,
/* ZeroBits */ 0,