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Android/ARM portability

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2-byte alignment isn't good enough for subpages
This commit is contained in:
Howard Chu 2011-10-14 22:03:46 -07:00
parent 331bf92df5
commit a103a64434
1 changed files with 29 additions and 0 deletions
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29
libraries/libmdb/mdb.c
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@ -74,6 +74,10 @@
#define BIG_ENDIAN __BIG_ENDIAN #define BIG_ENDIAN __BIG_ENDIAN
#endif #endif
#if defined(__i386) || defined(__x86_64)
#define MISALIGNED_OK 1
#endif
#include "mdb.h" #include "mdb.h"
#include "midl.h" #include "midl.h"
@ -122,6 +126,9 @@
#define UNLOCK_MUTEX_W(env) sem_post((env)->me_wmutex) #define UNLOCK_MUTEX_W(env) sem_post((env)->me_wmutex)
#define fdatasync(fd) fsync(fd) #define fdatasync(fd) fsync(fd)
#else #else
#ifdef ANDROID
#define fdatasync(fd) fsync(fd)
#endif
/** Lock the reader mutex. /** Lock the reader mutex.
*/ */
#define LOCK_MUTEX_R(env) pthread_mutex_lock(&(env)->me_txns->mti_mutex) #define LOCK_MUTEX_R(env) pthread_mutex_lock(&(env)->me_txns->mti_mutex)
@ -3996,7 +4003,18 @@ more:
fp = NODEDATA(leaf); fp = NODEDATA(leaf);
if (flags == MDB_CURRENT) { if (flags == MDB_CURRENT) {
fp->mp_flags |= P_DIRTY; fp->mp_flags |= P_DIRTY;
#ifdef MISALIGNED_OK
fp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno; fp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno;
#else
{
unsigned short *src, *dst;
int i;
dst = (unsigned short *)&fp->mp_pgno;
src = (unsigned short *)&mc->mc_pg[mc->mc_top]->mp_pgno;
for (i=0; i<sizeof(fp->mp_pgno)/sizeof(unsigned short); i++)
*dst++ = *src++;
}
#endif
mc->mc_xcursor->mx_cursor.mc_pg[0] = fp; mc->mc_xcursor->mx_cursor.mc_pg[0] = fp;
flags |= F_DUPDATA; flags |= F_DUPDATA;
goto put_sub; goto put_sub;
@ -4603,7 +4621,18 @@ mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node)
mx->mx_db.md_leaf_pages = 1; mx->mx_db.md_leaf_pages = 1;
mx->mx_db.md_overflow_pages = 0; mx->mx_db.md_overflow_pages = 0;
mx->mx_db.md_entries = NUMKEYS(fp); mx->mx_db.md_entries = NUMKEYS(fp);
#ifdef MISALIGNED_OK
mx->mx_db.md_root = fp->mp_pgno; mx->mx_db.md_root = fp->mp_pgno;
#else
{
unsigned short *src, *dst;
int i;
dst = (unsigned short *)&mx->mx_db.md_root;
src = (unsigned short *)&fp->mp_pgno;
for (i=0; i<sizeof(fp->mp_pgno)/sizeof(unsigned short); i++)
*dst++ = *src++;
}
#endif
mx->mx_cursor.mc_snum = 1; mx->mx_cursor.mc_snum = 1;
mx->mx_cursor.mc_flags = C_INITIALIZED|C_SUB; mx->mx_cursor.mc_flags = C_INITIALIZED|C_SUB;
mx->mx_cursor.mc_top = 0; mx->mx_cursor.mc_top = 0;