database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-07 02:42:48 +03:00
Code Activity

Disable the use of memory-mapped I/O if the SQLITE_DISABLE_MMAP macro is

Browse Source 
defined.  Automatically define this macro for OpenBSD and QNX.  Other
systems are likely to be added to the disabled list over time.

FossilOrigin-Name: 8a4314a398c6c6efb25e6993c826b7e60d9bb1f9
This commit is contained in:
drh
2013-04-08 20:47:49 +00:00
parent f90e50f60b
commit 188d488409
14 changed files with 86 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/os.c
View File

@@ -141,6 +141,8 @@ int sqlite3OsShmMap(
return id->pMethods->xShmMap(id, iPage, pgsz, bExtend, pp);
}
#if !defined(SQLITE_DISABLE_MMAP)
/* The real implementation of xFetch and xUnfetch */
int sqlite3OsFetch(sqlite3_file *id, i64 iOff, int iAmt, void **pp){
DO_OS_MALLOC_TEST(id);
return id->pMethods->xFetch(id, iOff, iAmt, pp);
@@ -148,6 +150,16 @@ int sqlite3OsFetch(sqlite3_file *id, i64 iOff, int iAmt, void **pp){
int sqlite3OsUnfetch(sqlite3_file *id, i64 iOff, void *p){
return id->pMethods->xUnfetch(id, iOff, p);
}
#else
/* No-op stubs to use when memory-mapped I/O is disabled */
int sqlite3OsFetch(sqlite3_file *id, i64 iOff, int iAmt, void **pp){
*pp = 0;
return SQLITE_OK;
}
int sqlite3OsUnfetch(sqlite3_file *id, i64 iOff, void *p){
return SQLITE_OK;
}
#endif
/*
** The next group of routines are convenience wrappers around the