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Overview
| Comment: | Add assert() statements to demonstrate that memory allocations are always aligned to an 8-byte boundary (unless SQLITE_4_BYTE_ALIGNED_MALLOC is defined). |
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| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
305cc4e6c1164b1ede0c3177e3c0f9b8 |
| User & Date: | drh 2010-09-11 15:54:53 |
Context
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2010-09-11
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| 16:15 | Additional evidence marks on the malloc() implementation. Update the documentation to explain that mallocs are not necessarily 8-byte aligned if the SQLITE_4_BYTE_ALIGNED_MALLOC compile-time option is used. check-in: 42b4bf9e user: drh tags: trunk | |
| 15:54 | Add assert() statements to demonstrate that memory allocations are always aligned to an 8-byte boundary (unless SQLITE_4_BYTE_ALIGNED_MALLOC is defined). check-in: 305cc4e6 user: drh tags: trunk | |
| 05:15 | When building from the amalgamation with ENABLE_RTREE defined, do not try to include sqlite3rtree.h. check-in: 5b63e981 user: dan tags: trunk | |
Changes
Changes to src/malloc.c.
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}else if( sqlite3GlobalConfig.bMemstat ){
sqlite3_mutex_enter(mem0.mutex);
mallocWithAlarm(n, &p);
sqlite3_mutex_leave(mem0.mutex);
}else{
p = sqlite3GlobalConfig.m.xMalloc(n);
}
return p;
}
/*
** This version of the memory allocation is for use by the application.
** First make sure the memory subsystem is initialized, then do the
** allocation.
................................................................................
nNew = sqlite3MallocSize(pNew);
sqlite3StatusAdd(SQLITE_STATUS_MEMORY_USED, nNew-nOld);
}
sqlite3_mutex_leave(mem0.mutex);
}else{
pNew = sqlite3GlobalConfig.m.xRealloc(pOld, nNew);
}
return pNew;
}
/*
** The public interface to sqlite3Realloc. Make sure that the memory
** subsystem is initialized prior to invoking sqliteRealloc.
*/
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}else if( sqlite3GlobalConfig.bMemstat ){
sqlite3_mutex_enter(mem0.mutex);
mallocWithAlarm(n, &p);
sqlite3_mutex_leave(mem0.mutex);
}else{
p = sqlite3GlobalConfig.m.xMalloc(n);
}
assert( EIGHT_BYTE_ALIGNMENT(p) ); /* IMP: R-36023-12588 */
return p;
}
/*
** This version of the memory allocation is for use by the application.
** First make sure the memory subsystem is initialized, then do the
** allocation.
................................................................................
nNew = sqlite3MallocSize(pNew);
sqlite3StatusAdd(SQLITE_STATUS_MEMORY_USED, nNew-nOld);
}
sqlite3_mutex_leave(mem0.mutex);
}else{
pNew = sqlite3GlobalConfig.m.xRealloc(pOld, nNew);
}
assert( EIGHT_BYTE_ALIGNMENT(pNew) ); /* IMP: R-36023-12588 */
return pNew;
}
/*
** The public interface to sqlite3Realloc. Make sure that the memory
** subsystem is initialized prior to invoking sqliteRealloc.
*/
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