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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2012 Red Hat, Inc.
* All rights reserved.
*
* License: GPL (version 3 or any later version).
* See LICENSE for details.
* END COPYRIGHT BLOCK **/
/*
* Thread Local Storage Functions
*/
#include "slap.h"
#include <pthread.h>
/*
* Thread Local Storage Indexes
*/
static pthread_key_t td_requestor_dn; /* TD_REQUESTOR_DN */
static pthread_key_t td_plugin_list; /* SLAPI_TD_PLUGIN_LIST_LOCK - integer set to 1 or zero */
static pthread_key_t td_op_state;
/*
* Destructor Functions
*/
static void
td_dn_destructor(void *priv)
{
slapi_ch_free((void **)&priv);
}
static void
td_op_state_destroy(void *priv) {
slapi_ch_free((void **)&priv);
}
int32_t
slapi_td_init(void)
{
if (pthread_key_create(&td_requestor_dn, td_dn_destructor) != 0) {
slapi_log_err(SLAPI_LOG_CRIT, "slapi_td_init", "Failed it create private thread index for td_requestor_dn/td_dn_destructor\n");
return PR_FAILURE;
}
if (pthread_key_create(&td_plugin_list, NULL) != 0) {
slapi_log_err(SLAPI_LOG_CRIT, "slapi_td_init", "Failed it create private thread index for td_plugin_list\n");
return PR_FAILURE;
}
if(pthread_key_create(&td_op_state, td_op_state_destroy) != 0){
slapi_log_err(SLAPI_LOG_CRIT, "slapi_td_init", "Failed it create private thread index for td_op_state\n");
return PR_FAILURE;
}
return PR_SUCCESS;
}
/*
* Wrapper Functions
*/
/* plugin list locking */
int32_t
slapi_td_set_plugin_locked()
{
int32_t val = 12345;
if (pthread_setspecific(td_plugin_list, (void *)&val) != 0) {
return PR_FAILURE;
}
return PR_SUCCESS;
}
int32_t
slapi_td_set_plugin_unlocked()
{
if (pthread_setspecific(td_plugin_list, NULL) != 0) {
return PR_FAILURE;
}
return PR_SUCCESS;
}
int32_t
slapi_td_get_plugin_locked()
{
int32_t *value = pthread_getspecific(td_plugin_list);
if (value == NULL) {
return 0;
}
return 1;
}
/* requestor dn */
int32_t
slapi_td_set_dn(char *value)
{
char *dn = pthread_getspecific(td_requestor_dn);
slapi_ch_free_string(&dn);
if (pthread_setspecific(td_requestor_dn, value) != 0) {
return PR_FAILURE;
}
return PR_SUCCESS;
}
void
slapi_td_get_dn(char **value)
{
if (value) {
*value = pthread_getspecific(td_requestor_dn);
}
}
/* Worker op-state */
struct slapi_td_log_op_state_t *
slapi_td_get_log_op_state() {
return pthread_getspecific(td_op_state);
}
/*
* Increment the internal operation count. Unless we are nested, in that case
* do not update the internal op counter. If we just became "unnested" then
* update the state to keep the counters on track.
*/
void
slapi_td_internal_op_start(void)
{
struct slapi_td_log_op_state_t *op_state = pthread_getspecific(td_op_state);
/* Allocate if needed */
if (op_state == NULL) {
op_state = (struct slapi_td_log_op_state_t *)slapi_ch_calloc(1, sizeof(struct slapi_td_log_op_state_t));
if (pthread_setspecific(td_op_state, op_state) != 0) {
slapi_log_err(SLAPI_LOG_CRIT, "slapi_td_internal_op_start",
"Failed to set op_state to td_op_state. OOM?\n");
return;
}
}
/* Bump the nested count */
op_state->op_nest_count += 1;
if (op_state->op_nest_count > 1){
/* We are nested */
op_state->op_nest_state = OP_STATE_NESTED;
} else {
/* We are not nested */
op_state->op_int_id += 1;
if (op_state->op_nest_state == OP_STATE_PREV_NESTED) {
/* But we were just previously nested, so update the state */
op_state->op_nest_state = OP_STATE_NOTNESTED;
}
}
}
/*
* Decrement the nested count. If we were nested and we are NOW unnested
* then we need to reset the state so on the next new internal op we set the
* counters to the correct/expected/next-sequential value.
*/
void
slapi_td_internal_op_finish(void)
{
struct slapi_td_log_op_state_t *op_state = pthread_getspecific(td_op_state);
/* Allocate if needed - should be unreachable!*/
PR_ASSERT(op_state);
if (op_state == NULL) {
op_state = (struct slapi_td_log_op_state_t *)slapi_ch_calloc(1, sizeof(struct slapi_td_log_op_state_t));
if (pthread_setspecific(td_op_state, op_state) != 0) {
slapi_log_err(SLAPI_LOG_CRIT, "slapi_td_internal_op_finish",
"Failed to set op_state to td_op_state. OOM?\n");
return;
}
}
/* decrement nested count */
op_state->op_nest_count -= 1;
/* If we were nested, but NOT anymore, then update the state */
if ( op_state->op_nest_state == OP_STATE_NESTED && op_state->op_nest_count == 1){
op_state->op_nest_state = OP_STATE_PREV_NESTED;
}
}
void
slapi_td_reset_internal_logging(uint64_t new_conn_id, int32_t new_op_id)
{
struct slapi_td_log_op_state_t *op_state = pthread_getspecific(td_op_state);
/* Allocate if needed */
if (op_state == NULL) {
op_state = (struct slapi_td_log_op_state_t *)slapi_ch_calloc(1, sizeof(struct slapi_td_log_op_state_t));
if (pthread_setspecific(td_op_state, op_state) != 0) {
slapi_log_err(SLAPI_LOG_CRIT, "slapi_td_internal_op_finish",
"Failed to set op_state to td_op_state. OOM?\n");
return;
}
}
op_state->conn_id = new_conn_id;
op_state->op_id = new_op_id;
op_state->op_int_id = 0;
op_state->op_nest_count = 0;
op_state->op_nest_state = OP_STATE_NOTNESTED;
}
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