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Miscellaneous code and comment cleanup.

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FossilOrigin-Name: fa6069fb3b0a4411fd6661dec7de40ece3064a2fe4b94ebfbda9e5e524e04e86
This commit is contained in:
drh
2018-01-03 22:48:38 +00:00
parent 3ec8665e22
commit 99abe5c478
4 changed files with 29 additions and 50 deletions
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45
src/memdb.c
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@@ -10,8 +10,11 @@
**
******************************************************************************
**
** This is an in-memory VFS implementation. The application supplies
** a chunk of memory to hold the database file.
** This file implements in-memory VFS. A database is held as a contiguous
** block of memory.
**
** This file also implements interface sqlite3_serialize() and
** sqlite3_deserialize().
*/
#ifdef SQLITE_ENABLE_MEMDB
#include "sqliteInt.h"
@@ -52,10 +55,6 @@ static int memdbCheckReservedLock(sqlite3_file*, int *pResOut);
static int memdbFileControl(sqlite3_file*, int op, void *pArg);
static int memdbSectorSize(sqlite3_file*);
static int memdbDeviceCharacteristics(sqlite3_file*);
static int memdbShmMap(sqlite3_file*, int iPg, int pgsz, int, void volatile**);
static int memdbShmLock(sqlite3_file*, int offset, int n, int flags);
static void memdbShmBarrier(sqlite3_file*);
static int memdbShmUnmap(sqlite3_file*, int deleteFlag);
static int memdbFetch(sqlite3_file*, sqlite3_int64 iOfst, int iAmt, void **pp);
static int memdbUnfetch(sqlite3_file*, sqlite3_int64 iOfst, void *p);
@@ -112,10 +111,10 @@ static const sqlite3_io_methods memdb_io_methods = {
memdbFileControl, /* xFileControl */
memdbSectorSize, /* xSectorSize */
memdbDeviceCharacteristics, /* xDeviceCharacteristics */
memdbShmMap, /* xShmMap */
memdbShmLock, /* xShmLock */
memdbShmBarrier, /* xShmBarrier */
memdbShmUnmap, /* xShmUnmap */
0, /* xShmMap */
0, /* xShmLock */
0, /* xShmBarrier */
0, /* xShmUnmap */
memdbFetch, /* xFetch */
memdbUnfetch /* xUnfetch */
};
@@ -264,32 +263,6 @@ static int memdbDeviceCharacteristics(sqlite3_file *pFile){
SQLITE_IOCAP_SEQUENTIAL;
}
/* Create a shared memory file mapping */
static int memdbShmMap(
sqlite3_file *pFile,
int iPg,
int pgsz,
int bExtend,
void volatile **pp
){
return SQLITE_IOERR_SHMMAP;
}
/* Perform locking on a shared-memory segment */
static int memdbShmLock(sqlite3_file *pFile, int offset, int n, int flags){
return SQLITE_IOERR_SHMLOCK;
}
/* Memory barrier operation on shared memory */
static void memdbShmBarrier(sqlite3_file *pFile){
return;
}
/* Unmap a shared memory segment */
static int memdbShmUnmap(sqlite3_file *pFile, int deleteFlag){
return SQLITE_OK;
}
/* Fetch a page of a memory-mapped file */
static int memdbFetch(
sqlite3_file *pFile,