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Make ldap_int_thread_userctx_t.ltu_key[] a proper NULL-terminated array.

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(setkey/getkey expected that, but purgekey could set a NULL in the middle.)
Added some checks for input key!=NULL.

API changes, need review - I'm not sure what's indented here:
- setkey(data=NULL, kfree!=NULL) searched as if intended to reset
  the key, but updated by setting the key.  Now always updates.
- setkey(key=<not found>, data=NULL) could return either success or
  failure.  Now succeeds iff (data == NULL && kfree == NULL).
This commit is contained in:
Hallvard Furuseth 2007-05-09 22:59:04 +00:00
parent f5da908c49
commit f0a1511422
1 changed files with 36 additions and 27 deletions
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63
libraries/libldap_r/tpool.c
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@ -823,7 +823,7 @@ int ldap_pvt_thread_pool_getkey(
ldap_int_thread_userctx_t *ctx = xctx;
int i;
if ( !ctx || !data ) return EINVAL;
if ( !ctx || !key || !data ) return EINVAL;
for ( i=0; i<MAXKEYS && ctx->ltu_key[i].ltk_key; i++ ) {
if ( ctx->ltu_key[i].ltk_key == key ) {
@ -835,6 +835,18 @@ int ldap_pvt_thread_pool_getkey(
return ENOENT;
}
static void
clear_key_idx( ldap_int_thread_userctx_t *ctx, int i )
{
int j = i;
while ( ++j < MAXKEYS && ctx->ltu_key[j].ltk_key );
if ( --j != i ) {
ctx->ltu_key[i] = ctx->ltu_key[j];
i = j;
}
ctx->ltu_key[i].ltk_key = NULL;
}
int ldap_pvt_thread_pool_setkey(
void *xctx,
void *key,
@ -842,34 +854,30 @@ int ldap_pvt_thread_pool_setkey(
ldap_pvt_thread_pool_keyfree_t *kfree )
{
ldap_int_thread_userctx_t *ctx = xctx;
int i;
int i, found;
if ( !ctx || !key ) return EINVAL;
for ( i=0; i<MAXKEYS; i++ ) {
if (( data && !ctx->ltu_key[i].ltk_key ) || ctx->ltu_key[i].ltk_key == key ) {
if ( data || kfree ) {
ctx->ltu_key[i].ltk_key = key;
ctx->ltu_key[i].ltk_data = data;
ctx->ltu_key[i].ltk_free = kfree;
} else {
int j;
for ( j=i+1; j<MAXKEYS; j++ )
if ( !ctx->ltu_key[j].ltk_key ) break;
j--;
if ( j != i ) {
ctx->ltu_key[i].ltk_key = ctx->ltu_key[j].ltk_key;
ctx->ltu_key[i].ltk_data = ctx->ltu_key[j].ltk_data;
ctx->ltu_key[i].ltk_free = ctx->ltu_key[j].ltk_free;
}
ctx->ltu_key[j].ltk_key = NULL;
ctx->ltu_key[j].ltk_data = NULL;
ctx->ltu_key[j].ltk_free = NULL;
}
return 0;
for ( i=found=0; i<MAXKEYS; i++ ) {
if ( ctx->ltu_key[i].ltk_key == key ) {
found = 1;
break;
} else if ( !ctx->ltu_key[i].ltk_key ) {
break;
}
}
return ENOMEM;
if ( data || kfree ) {
if ( i>=MAXKEYS )
return ENOMEM;
ctx->ltu_key[i].ltk_key = key;
ctx->ltu_key[i].ltk_data = data;
ctx->ltu_key[i].ltk_free = kfree;
} else if ( found ) {
clear_key_idx( ctx, i );
}
return 0;
}
/* Free all elements with this key, no matter which thread they're in.
@ -880,16 +888,17 @@ void ldap_pvt_thread_pool_purgekey( void *key )
int i, j;
ldap_int_thread_userctx_t *ctx;
assert ( key != NULL );
for ( i=0; i<LDAP_MAXTHR; i++ ) {
ctx = thread_keys[i].ctx;
if ( ctx && ctx != DELETED_THREAD_CTX ) {
for ( j=0; j<MAXKEYS; j++ ) {
for ( j=0; j<MAXKEYS && ctx->ltu_key[j].ltk_key; j++ ) {
if ( ctx->ltu_key[j].ltk_key == key ) {
if (ctx->ltu_key[j].ltk_free)
ctx->ltu_key[j].ltk_free( ctx->ltu_key[j].ltk_key,
ctx->ltu_key[j].ltk_data );
ctx->ltu_key[j].ltk_key = NULL;
ctx->ltu_key[j].ltk_free = NULL;
clear_key_idx( ctx, j );
break;
}
}