int spmemvfs_open_db( spmemvfs_db_t * db, const char * path, spmembuffer_t * mem )
{
int ret = 0;
spmembuffer_link_t * iter = NULL;
memset( db, 0, sizeof( spmemvfs_db_t ) );
iter = (spmembuffer_link_t*)calloc( sizeof( spmembuffer_link_t ), 1 );
iter->path = strdup( path );
iter->mem = mem;
sqlite3_mutex_enter( g_spmemvfs_env->mutex );
{
iter->next = g_spmemvfs_env->head;
g_spmemvfs_env->head = iter;
}
sqlite3_mutex_leave( g_spmemvfs_env->mutex );
ret = sqlite3_open_v2( path, &(db->handle),
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, SPMEMVFS_NAME );
if( 0 == ret ) {
db->mem = mem;
} else {
sqlite3_mutex_enter( g_spmemvfs_env->mutex );
{
iter = spmembuffer_link_remove( &(g_spmemvfs_env->head), path );
if( NULL != iter ) spmembuffer_link_free( iter );
}
sqlite3_mutex_leave( g_spmemvfs_env->mutex );
}
return ret;
}
static spmembuffer_t * load_cb( void * arg, const char * path )
{
spmembuffer_t * ret = NULL;
spmemvfs_env_t * env = (spmemvfs_env_t*)arg;
sqlite3_mutex_enter( env->mutex );
{
spmembuffer_link_t * toFind = spmembuffer_link_remove( &( env->head ), path );
if( NULL != toFind ) {
ret = toFind->mem;
free( toFind->path );
free( toFind );
}
}
sqlite3_mutex_leave( env->mutex );
return ret;
}
