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Add the SQLITE_CONFIG_MEMDB_MAXSIZE configuration option for configuring

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the default maximum size of an in-memory database created using
sqlite3_deserialize().  This is necessary to make the interface reasonably
testable.

FossilOrigin-Name: cb72ee0478ce98c48aae059fd5de4e36caf2b8c953e08fcb799bfd119ad46b73
This commit is contained in:
drh
2019-01-31 15:38:53 +00:00
parent b92b019fe3
commit 23a885956e
7 changed files with 48 additions and 21 deletions
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11
src/memdb.c
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@@ -42,11 +42,6 @@ struct MemFile {
int eLock; /* Most recent lock against this file */
};
/* The default maximum size of an in-memory database */
#ifndef SQLITE_MEMDB_DEFAULT_MAXSIZE
# define SQLITE_MEMDB_DEFAULT_MAXSIZE 1073741824
#endif
/*
** Methods for MemFile
*/
@@ -346,7 +341,7 @@ static int memdbOpen(
assert( pOutFlags!=0 ); /* True because flags==SQLITE_OPEN_MAIN_DB */
*pOutFlags = flags | SQLITE_OPEN_MEMORY;
p->base.pMethods = &memdb_io_methods;
p->szMax = SQLITE_MEMDB_DEFAULT_MAXSIZE;
p->szMax = sqlite3GlobalConfig.mxMemdbSize;
return SQLITE_OK;
}
@@ -598,8 +593,8 @@ int sqlite3_deserialize(
p->sz = szDb;
p->szAlloc = szBuf;
p->szMax = szBuf;
if( p->szMax<SQLITE_MEMDB_DEFAULT_MAXSIZE ){
p->szMax = SQLITE_MEMDB_DEFAULT_MAXSIZE;
if( p->szMax<sqlite3GlobalConfig.mxMemdbSize ){
p->szMax = sqlite3GlobalConfig.mxMemdbSize;
}
p->mFlags = mFlags;
rc = SQLITE_OK;