forked from apache/zookeeper
/
ZooKeeper.xs
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/
ZooKeeper.xs
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/* Net::ZooKeeper - Perl extension for Apache ZooKeeper
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <pthread.h> /* pthread_mutex_lock(), etc. */
#include <string.h> /* memset(), etc. */
#include <limits.h> /* CHAR_BIT */
#include <sys/time.h> /* gettimeofday() */
#include <zookeeper/zookeeper.h>
#include "build/check_zk_version.h"
#define PACKAGE_NAME "Net::ZooKeeper"
#define PACKAGE_SIGNATURE 19631123
#define STAT_PACKAGE_NAME "Net::ZooKeeper::Stat"
#define STAT_PACKAGE_SIGNATURE 19960512
#define WATCH_PACKAGE_NAME "Net::ZooKeeper::Watch"
#define WATCH_PACKAGE_SIGNATURE 20050326
#define MAX_KEY_NAME_LEN 16 /* "children_version" */
#define NUM_ACL_ENTRY_KEYS 3
#define NUM_KEYS 7
#define NUM_STAT_KEYS 11
#define NUM_WATCH_KEYS 3
#define DEFAULT_RECV_TIMEOUT_MSEC 10000
#define DEFAULT_DATA_BUF_LEN 1023
#define DEFAULT_PATH_BUF_LEN 1023
#define DEFAULT_WATCH_TIMEOUT 60000
#define ZOO_LOG_LEVEL_OFF 0
#ifndef strcaseEQ
#define strcaseEQ(a,b) (!strcasecmp((a),(b)))
#endif
typedef struct Stat zk_stat_t;
typedef HV* Net__ZooKeeper__Stat;
typedef struct zk_watch_t zk_watch_t;
struct zk_watch_t {
pthread_mutex_t mutex;
pthread_cond_t cond;
int done;
int ret;
int event_type;
int event_state;
unsigned int timeout;
zk_watch_t *prev;
zk_watch_t *next;
int ref_count;
};
typedef HV* Net__ZooKeeper__Watch;
typedef struct {
zhandle_t *handle;
zk_watch_t *first_watch;
int data_buf_len;
int path_buf_len;
unsigned int watch_timeout;
const char *hosts;
int hosts_len;
int last_ret;
int last_errno;
} zk_t;
typedef HV* Net__ZooKeeper;
typedef struct {
I32 signature;
union {
zk_t *zk;
zk_stat_t *stat;
zk_watch_t *watch;
} handle;
} zk_handle_t;
typedef struct {
const char name[MAX_KEY_NAME_LEN + 1];
U32 name_len;
size_t offset;
size_t size;
U32 hash;
} zk_key_t;
static zk_key_t zk_acl_entry_keys[NUM_ACL_ENTRY_KEYS] = {
{"perms", 0, 0, 0, 0},
{"scheme", 0, 0, 0, 0},
{"id", 0, 0, 0, 0}
};
static zk_key_t zk_keys[NUM_KEYS] = {
{"data_read_len", 0, 0, 0, 0},
{"path_read_len", 0, 0, 0, 0},
{"watch_timeout", 0, 0, 0, 0},
{"hosts", 0, 0, 0, 0},
{"session_timeout", 0, 0, 0, 0},
{"session_id", 0, 0, 0, 0},
{"pending_watches", 0, 0, 0, 0}
};
static zk_key_t zk_stat_keys[NUM_STAT_KEYS] = {
{"czxid", 0, offsetof(struct Stat, czxid),
sizeof(((struct Stat*) 0)->czxid), 0},
{"mzxid", 0, offsetof(struct Stat, mzxid),
sizeof(((struct Stat*) 0)->mzxid), 0},
{"ctime", 0, offsetof(struct Stat, ctime),
sizeof(((struct Stat*) 0)->ctime), 0},
{"mtime", 0, offsetof(struct Stat, mtime),
sizeof(((struct Stat*) 0)->mtime), 0},
{"version", 0, offsetof(struct Stat, version),
sizeof(((struct Stat*) 0)->version), 0},
{"children_version", 0, offsetof(struct Stat, cversion),
sizeof(((struct Stat*) 0)->cversion), 0},
{"acl_version", 0, offsetof(struct Stat, aversion),
sizeof(((struct Stat*) 0)->aversion), 0},
{"ephemeral_owner", 0, offsetof(struct Stat, ephemeralOwner),
sizeof(((struct Stat*) 0)->ephemeralOwner), 0},
{"data_len", 0, offsetof(struct Stat, dataLength),
sizeof(((struct Stat*) 0)->dataLength), 0},
{"num_children", 0, offsetof(struct Stat, numChildren),
sizeof(((struct Stat*) 0)->numChildren), 0},
{"children_zxid", 0, offsetof(struct Stat, pzxid),
sizeof(((struct Stat*) 0)->pzxid), 0}
};
static zk_key_t zk_watch_keys[NUM_WATCH_KEYS] = {
{"timeout", 0, 0, 0, 0},
{"event", 0, 0, 0, 0},
{"state", 0, 0, 0, 0}
};
static void _zk_watcher(zhandle_t *handle, int type, int state,
const char *path, void *context)
{
zk_watch_t *watch_ctx = context;
pthread_mutex_lock(&watch_ctx->mutex);
watch_ctx->event_type = type;
watch_ctx->event_state = state;
watch_ctx->done = 1;
pthread_cond_signal(&watch_ctx->cond);
pthread_mutex_unlock(&watch_ctx->mutex);
return;
}
static void _zk_auth_completion(int ret, const void *data)
{
zk_watch_t *watch_ctx = (zk_watch_t*) data;
pthread_mutex_lock(&watch_ctx->mutex);
watch_ctx->ret = ret;
watch_ctx->done = 1;
pthread_cond_signal(&watch_ctx->cond);
pthread_mutex_unlock(&watch_ctx->mutex);
return;
}
static zk_watch_t *_zk_create_watch(pTHX)
{
zk_watch_t *watch;
Newxz(watch, 1, zk_watch_t);
if (pthread_mutex_init(&watch->mutex, NULL)) {
int save_errno = errno;
Safefree(watch);
errno = save_errno;
return NULL;
}
if (pthread_cond_init(&watch->cond, NULL)) {
int save_errno = errno;
pthread_mutex_destroy(&watch->mutex);
Safefree(watch);
errno = save_errno;
return NULL;
}
return watch;
}
static void _zk_destroy_watch(pTHX_ zk_watch_t *watch)
{
pthread_cond_destroy(&watch->cond);
pthread_mutex_destroy(&watch->mutex);
Safefree(watch);
return;
}
static zk_watch_t *_zk_acquire_watch(pTHX)
{
zk_watch_t *watch = _zk_create_watch(aTHX);
if (watch) {
watch->ref_count = 1;
}
return watch;
}
static void _zk_release_watch(pTHX_ zk_watch_t *watch, int list)
{
if (list) {
if (watch->prev) {
watch->prev->next = watch->next;
}
if (watch->next) {
watch->next->prev = watch->prev;
}
watch->prev = NULL;
watch->next = NULL;
}
if (--watch->ref_count == 0) {
_zk_destroy_watch(aTHX_ watch);
}
return;
}
static unsigned int _zk_release_watches(pTHX_ zk_watch_t *first_watch,
int final)
{
zk_watch_t *watch = first_watch->next;
unsigned int pending_watches = 0;
while (watch) {
zk_watch_t *next_watch = watch->next;
int done = final;
if (!final) {
pthread_mutex_lock(&watch->mutex);
done = watch->done;
pthread_mutex_unlock(&watch->mutex);
}
if (done) {
_zk_release_watch(aTHX_ watch, 1);
}
else {
++pending_watches;
}
watch = next_watch;
}
return pending_watches;
}
static void _zk_replace_watch(pTHX_ zk_handle_t *handle,
zk_watch_t *first_watch,
zk_watch_t *old_watch, zk_watch_t *new_watch)
{
zk_watch_t *next_watch;
new_watch->timeout = old_watch->timeout;
_zk_release_watch(aTHX_ old_watch, 0);
/* cleanup any completed watches not tied to a handle */
_zk_release_watches(aTHX_ first_watch, 0);
next_watch = first_watch->next;
new_watch->prev = first_watch;
new_watch->next = next_watch;
if (next_watch) {
next_watch->prev = new_watch;
}
first_watch->next = new_watch;
++new_watch->ref_count;
handle->handle.watch = new_watch;
return;
}
static void _zk_free_acl(pTHX_ struct ACL_vector *acl)
{
if (acl->data) {
Safefree(acl->data);
}
return;
}
static const char *_zk_fill_acl(pTHX_ AV *acl_arr, struct ACL_vector *acl)
{
I32 num_acl_entries = av_len(acl_arr) + 1;
int i;
Zero(acl, 1, struct ACL_vector);
if (num_acl_entries <= 0) {
return NULL;
}
else if (num_acl_entries > PERL_INT_MAX) {
num_acl_entries = PERL_INT_MAX;
}
Newx(acl->data, num_acl_entries, struct ACL);
for (i = 0; i < num_acl_entries; ++i) {
SV **acl_entry_ptr;
HV *acl_entry_hash;
zk_key_t *key;
SV **val_ptr;
struct ACL acl_entry;
acl_entry_ptr = av_fetch(acl_arr, i, 0);
if (!acl_entry_ptr) {
continue;
}
if (!SvROK(*acl_entry_ptr) ||
SvTYPE(SvRV(*acl_entry_ptr)) != SVt_PVHV) {
_zk_free_acl(aTHX_ acl);
return "invalid ACL entry hash reference";
}
acl_entry_hash = (HV*) SvRV(*acl_entry_ptr);
key = &zk_acl_entry_keys[0];
val_ptr = hv_fetch(acl_entry_hash, key->name, key->name_len, 0);
if (!val_ptr) {
_zk_free_acl(aTHX_ acl);
return "no ACL entry perms element";
}
acl_entry.perms = SvIV(*val_ptr);
if (!acl_entry.perms || (acl_entry.perms & ~ZOO_PERM_ALL)) {
_zk_free_acl(aTHX_ acl);
return "invalid ACL entry perms";
}
key = &zk_acl_entry_keys[1];
val_ptr = hv_fetch(acl_entry_hash, key->name, key->name_len, 0);
if (!val_ptr) {
_zk_free_acl(aTHX_ acl);
return "no ACL entry scheme element";
}
acl_entry.id.scheme = SvPV_nolen(*val_ptr);
key = &zk_acl_entry_keys[2];
val_ptr = hv_fetch(acl_entry_hash, key->name, key->name_len, 0);
if (!val_ptr) {
_zk_free_acl(aTHX_ acl);
return "no ACL entry id element";
}
acl_entry.id.id = SvPV_nolen(*val_ptr);
++acl->count;
acl->data[i] = acl_entry;
}
return NULL;
}
static void _zk_fill_acl_entry_hash(pTHX_ struct ACL *acl_entry,
HV *acl_entry_hash)
{
zk_key_t *key;
SV *val;
key = &zk_acl_entry_keys[0];
val = newSViv(acl_entry->perms);
if (!hv_store(acl_entry_hash, key->name, key->name_len, val, key->hash)) {
SvREFCNT_dec(val);
}
key = &zk_acl_entry_keys[1];
val = newSVpv(acl_entry->id.scheme, 0);
if (!hv_store(acl_entry_hash, key->name, key->name_len, val, key->hash)) {
SvREFCNT_dec(val);
}
key = &zk_acl_entry_keys[2];
val = newSVpv(acl_entry->id.id, 0);
if (!hv_store(acl_entry_hash, key->name, key->name_len, val, key->hash)) {
SvREFCNT_dec(val);
}
return;
}
static zk_handle_t *_zk_check_handle_inner(pTHX_ HV *attr_hash,
I32 package_signature)
{
zk_handle_t *handle = NULL;
if (SvRMAGICAL(attr_hash)) {
MAGIC *magic = mg_find((SV*) attr_hash, PERL_MAGIC_ext);
if (magic) {
handle = (zk_handle_t*) magic->mg_ptr;
if (handle->signature != package_signature) {
handle = NULL;
}
}
}
return handle;
}
static zk_handle_t *_zk_check_handle_outer(pTHX_ HV *hash, HV **attr_hash_ptr,
const char *package_name,
I32 package_signature)
{
zk_handle_t *handle = NULL;
if (attr_hash_ptr) {
*attr_hash_ptr = NULL;
}
if (SvRMAGICAL((SV*) hash)) {
MAGIC *magic = mg_find((SV*) hash, PERL_MAGIC_tied);
if (magic) {
SV *attr = magic->mg_obj;
if (SvROK(attr) && SvTYPE(SvRV(attr)) == SVt_PVHV &&
sv_derived_from(attr, package_name)) {
HV *attr_hash = (HV*) SvRV(attr);
handle = _zk_check_handle_inner(aTHX_ attr_hash,
package_signature);
if (handle && attr_hash_ptr) {
*attr_hash_ptr = attr_hash;
}
}
}
}
return handle;
}
static zk_t *_zk_get_handle_inner(pTHX_ Net__ZooKeeper attr_hash)
{
zk_handle_t *handle;
handle = _zk_check_handle_inner(aTHX_ attr_hash, PACKAGE_SIGNATURE);
return handle ? handle->handle.zk : NULL;
}
static zk_t *_zk_get_handle_outer(pTHX_ Net__ZooKeeper zkh)
{
zk_handle_t *handle;
handle = _zk_check_handle_outer(aTHX_ zkh, NULL, PACKAGE_NAME,
PACKAGE_SIGNATURE);
return handle ? handle->handle.zk : NULL;
}
static zk_stat_t *_zks_get_handle_inner(pTHX_ Net__ZooKeeper__Stat attr_hash)
{
zk_handle_t *handle;
handle = _zk_check_handle_inner(aTHX_ attr_hash, STAT_PACKAGE_SIGNATURE);
return handle ? handle->handle.stat : NULL;
}
static zk_stat_t *_zks_get_handle_outer(pTHX_ Net__ZooKeeper__Stat zksh)
{
zk_handle_t *handle;
handle = _zk_check_handle_outer(aTHX_ zksh, NULL, STAT_PACKAGE_NAME,
STAT_PACKAGE_SIGNATURE);
return handle ? handle->handle.stat : NULL;
}
static zk_watch_t *_zkw_get_handle_inner(pTHX_ Net__ZooKeeper__Watch attr_hash)
{
zk_handle_t *handle;
handle = _zk_check_handle_inner(aTHX_ attr_hash, WATCH_PACKAGE_SIGNATURE);
return handle ? handle->handle.watch : NULL;
}
static zk_watch_t *_zkw_get_handle_outer(pTHX_ Net__ZooKeeper__Watch zkwh,
zk_handle_t **handle_ptr)
{
zk_handle_t *handle;
handle = _zk_check_handle_outer(aTHX_ zkwh, NULL, WATCH_PACKAGE_NAME,
WATCH_PACKAGE_SIGNATURE);
if (handle_ptr) {
*handle_ptr = handle;
}
return handle ? handle->handle.watch : NULL;
}
MODULE = Net::ZooKeeper PACKAGE = Net::ZooKeeper PREFIX = zk_
REQUIRE: 1.9508
PROTOTYPES: ENABLE
BOOT:
{
int i;
for (i = 0; i < NUM_ACL_ENTRY_KEYS; ++i) {
zk_key_t *key = &zk_acl_entry_keys[i];
key->name_len = strlen(key->name);
PERL_HASH(key->hash, key->name, key->name_len);
}
for (i = 0; i < NUM_KEYS; ++i) {
zk_keys[i].name_len = strlen(zk_keys[i].name);
}
for (i = 0; i < NUM_STAT_KEYS; ++i) {
zk_stat_keys[i].name_len = strlen(zk_stat_keys[i].name);
}
for (i = 0; i < NUM_WATCH_KEYS; ++i) {
zk_watch_keys[i].name_len = strlen(zk_watch_keys[i].name);
}
zoo_set_log_stream(NULL);
zoo_set_debug_level(0);
}
I32
zk_constant(alias=Nullch)
char *alias
ALIAS:
ZOK = ZOK
ZSYSTEMERROR = ZSYSTEMERROR
ZRUNTIMEINCONSISTENCY = ZRUNTIMEINCONSISTENCY
ZDATAINCONSISTENCY = ZDATAINCONSISTENCY
ZCONNECTIONLOSS = ZCONNECTIONLOSS
ZMARSHALLINGERROR = ZMARSHALLINGERROR
ZUNIMPLEMENTED = ZUNIMPLEMENTED
ZOPERATIONTIMEOUT = ZOPERATIONTIMEOUT
ZBADARGUMENTS = ZBADARGUMENTS
ZINVALIDSTATE = ZINVALIDSTATE
ZAPIERROR = ZAPIERROR
ZNONODE = ZNONODE
ZNOAUTH = ZNOAUTH
ZBADVERSION = ZBADVERSION
ZNOCHILDRENFOREPHEMERALS = ZNOCHILDRENFOREPHEMERALS
ZNODEEXISTS = ZNODEEXISTS
ZNOTEMPTY = ZNOTEMPTY
ZSESSIONEXPIRED = ZSESSIONEXPIRED
ZINVALIDCALLBACK = ZINVALIDCALLBACK
ZINVALIDACL = ZINVALIDACL
ZAUTHFAILED = ZAUTHFAILED
ZCLOSING = ZCLOSING
ZNOTHING = ZNOTHING
ZOO_EPHEMERAL = ZOO_EPHEMERAL
ZOO_SEQUENCE = ZOO_SEQUENCE
ZOO_PERM_READ = ZOO_PERM_READ
ZOO_PERM_WRITE = ZOO_PERM_WRITE
ZOO_PERM_CREATE = ZOO_PERM_CREATE
ZOO_PERM_DELETE = ZOO_PERM_DELETE
ZOO_PERM_ADMIN = ZOO_PERM_ADMIN
ZOO_PERM_ALL = ZOO_PERM_ALL
ZOO_CREATED_EVENT = ZOO_CREATED_EVENT
ZOO_DELETED_EVENT = ZOO_DELETED_EVENT
ZOO_CHANGED_EVENT = ZOO_CHANGED_EVENT
ZOO_CHILD_EVENT = ZOO_CHILD_EVENT
ZOO_SESSION_EVENT = ZOO_SESSION_EVENT
ZOO_NOTWATCHING_EVENT = ZOO_NOTWATCHING_EVENT
ZOO_EXPIRED_SESSION_STATE = ZOO_EXPIRED_SESSION_STATE
ZOO_AUTH_FAILED_STATE = ZOO_AUTH_FAILED_STATE
ZOO_CONNECTING_STATE = ZOO_CONNECTING_STATE
ZOO_ASSOCIATING_STATE = ZOO_ASSOCIATING_STATE
ZOO_CONNECTED_STATE = ZOO_CONNECTED_STATE
ZOO_LOG_LEVEL_OFF = ZOO_LOG_LEVEL_OFF
ZOO_LOG_LEVEL_ERROR = ZOO_LOG_LEVEL_ERROR
ZOO_LOG_LEVEL_WARN = ZOO_LOG_LEVEL_WARN
ZOO_LOG_LEVEL_INFO = ZOO_LOG_LEVEL_INFO
ZOO_LOG_LEVEL_DEBUG = ZOO_LOG_LEVEL_DEBUG
CODE:
if (!ix) {
if (!alias) {
alias = GvNAME(CvGV(cv));
}
if (strEQ(alias, "ZOK")) {
RETVAL = ZOK;
}
else if (strEQ(alias, "ZOO_LOG_LEVEL_OFF")) {
RETVAL = ZOO_LOG_LEVEL_OFF;
}
else {
Perl_croak(aTHX_ "unknown " PACKAGE_NAME " constant: %s",
alias);
}
}
else {
RETVAL = ix;
}
OUTPUT:
RETVAL
AV *
zk_acl_constant(alias=Nullch)
char *alias
ALIAS:
ZOO_OPEN_ACL_UNSAFE = 1
ZOO_READ_ACL_UNSAFE = 2
ZOO_CREATOR_ALL_ACL = 3
PREINIT:
struct ACL_vector acl;
AV *acl_arr;
int i;
PPCODE:
if (!ix && !alias) {
alias = GvNAME(CvGV(cv));
}
if (ix == 1 || strEQ(alias, "ZOO_OPEN_ACL_UNSAFE")) {
acl = ZOO_OPEN_ACL_UNSAFE;
}
else if (ix == 2 || strEQ(alias, "ZOO_READ_ACL_UNSAFE")) {
acl = ZOO_READ_ACL_UNSAFE;
}
else if (ix == 3 || strEQ(alias, "ZOO_CREATOR_ALL_ACL")) {
acl = ZOO_CREATOR_ALL_ACL;
}
else {
Perl_croak(aTHX_ "unknown " PACKAGE_NAME " constant: %s", alias);
}
acl_arr = newAV();
av_extend(acl_arr, acl.count);
for (i = 0; i < acl.count; ++i) {
HV *acl_entry_hash = newHV();
SV *val;
_zk_fill_acl_entry_hash(aTHX_ &acl.data[i], acl_entry_hash);
val = newRV_noinc((SV*) acl_entry_hash);
if (!av_store(acl_arr, i, val)) {
SvREFCNT_dec(val);
}
}
ST(0) = sv_2mortal(newRV_noinc((SV*) acl_arr));
XSRETURN(1);
void
zk_set_log_level(level)
int level
PPCODE:
if (level < ZOO_LOG_LEVEL_OFF || level > ZOO_LOG_LEVEL_DEBUG) {
Perl_croak(aTHX_ "invalid log level: %d", level);
}
zoo_set_debug_level(level);
XSRETURN_EMPTY;
void
zk_set_deterministic_conn_order(flag)
bool flag
PPCODE:
zoo_deterministic_conn_order(!!flag);
XSRETURN_EMPTY;
void
zk_new(package, hosts, ...)
char *package
char *hosts
PREINIT:
int recv_timeout = DEFAULT_RECV_TIMEOUT_MSEC;
const clientid_t *client_id = NULL;
zk_t *zk;
zk_handle_t *handle;
HV *stash, *zk_hash, *attr_hash;
SV *attr;
int i;
PPCODE:
if (items > 2 && items % 2) {
Perl_croak(aTHX_ "invalid number of arguments");
}
for (i = 2; i < items; i += 2) {
char *key = SvPV_nolen(ST(i));
if (strcaseEQ(key, "session_timeout")) {
recv_timeout = SvIV(ST(i + 1));
/* NOTE: would be nice if requirement in zookeeper_interest()
* that recv_timeout*2 be non-negative was documented
*/
if (recv_timeout < 0 || recv_timeout > (PERL_INT_MAX >> 1)) {
Perl_croak(aTHX_ "invalid session timeout: %d",
recv_timeout);
}
}
else if (strcaseEQ(key, "session_id")) {
STRLEN client_id_len;
client_id = (const clientid_t*) SvPV(ST(i + 1), client_id_len);
if (client_id_len != sizeof(clientid_t)) {
Perl_croak(aTHX_ "invalid session ID");
}
}
}
Newxz(zk, 1, zk_t);
zk->handle = zookeeper_init(hosts, NULL, recv_timeout,
client_id, NULL, 0);
if (!zk->handle) {
Safefree(zk);
XSRETURN_UNDEF;
}
Newxz(zk->first_watch, 1, zk_watch_t);
zk->data_buf_len = DEFAULT_DATA_BUF_LEN;
zk->path_buf_len = DEFAULT_PATH_BUF_LEN;
zk->watch_timeout = DEFAULT_WATCH_TIMEOUT;
zk->hosts_len = strlen(hosts);
zk->hosts = savepvn(hosts, zk->hosts_len);
Newx(handle, 1, zk_handle_t);
handle->signature = PACKAGE_SIGNATURE;
handle->handle.zk = zk;
/* We use several tricks from DBI here. The attr_hash is our
* empty inner hash; we attach extra magic to it in the form of
* our zk_handle_t structure. Then we tie attr_hash to zk_hash,
* our outer hash. This is what is passed around (by reference) by
* callers.
*
* Most methods use _zk_get_handle_outer() which finds our inner
* handle, then returns the zk_t structure from its extra magic
* pointer.
*
* However, the tied hash methods, FETCH(), STORE(), and so forth,
* receive an already-dereferenced inner handle hash. This is
* because we bless both inner and outer handles into this class,
* so when a caller's code references a hash element in our
* outer handle, Perl detects its tied magic, looks up the
* tied object (our inner handle) and invokes the tied hash methods
* in its class on it. Since we blessed it into the same class
* as the outer handle, these methods simply reside in our package.
*/
stash = gv_stashpv(package, GV_ADDWARN);
attr_hash = newHV();
sv_magic((SV*) attr_hash, Nullsv, PERL_MAGIC_ext,
(const char*) handle, 0);
attr = sv_bless(newRV_noinc((SV*) attr_hash), stash);
zk_hash = newHV();
sv_magic((SV*) zk_hash, attr, PERL_MAGIC_tied, Nullch, 0);
SvREFCNT_dec(attr);
ST(0) = sv_bless(sv_2mortal(newRV_noinc((SV*) zk_hash)), stash);
XSRETURN(1);
void
zk_DESTROY(zkh)
Net::ZooKeeper zkh
PREINIT:
zk_handle_t *handle;
HV *attr_hash;
int ret = ZBADARGUMENTS;
PPCODE:
handle = _zk_check_handle_outer(aTHX_ zkh, &attr_hash,
PACKAGE_NAME, PACKAGE_SIGNATURE);
if (!handle) {
handle = _zk_check_handle_inner(aTHX_ zkh, PACKAGE_SIGNATURE);
if (handle) {
attr_hash = zkh;
zkh = NULL;
}
}
if (handle) {
zk_t *zk = handle->handle.zk;
ret = zookeeper_close(zk->handle);
/* detach all now-inactive watches still tied to handles */
_zk_release_watches(aTHX_ zk->first_watch, 1);
Safefree(zk->first_watch);
Safefree(zk->hosts);
Safefree(zk);
Safefree(handle);
sv_unmagic((SV*) attr_hash, PERL_MAGIC_ext);
}
if (zkh && attr_hash) {
sv_unmagic((SV*) zkh, PERL_MAGIC_tied);
}
if (GIMME_V == G_VOID) {
XSRETURN_EMPTY;
}
else if (ret == ZOK) {
XSRETURN_YES;
}
else {
XSRETURN_NO;
}
void
zk_CLONE(package)
char *package
PPCODE:
XSRETURN_EMPTY;
void
zk_CLONE_SKIP(package)
char *package
PPCODE:
XSRETURN_YES;
void
zk_TIEHASH(package, ...)
char *package
PPCODE:
Perl_croak(aTHX_ "tying hashes of class "
PACKAGE_NAME " not supported");
void
zk_UNTIE(attr_hash, ref_count)
Net::ZooKeeper attr_hash
IV ref_count
PPCODE:
Perl_croak(aTHX_ "untying hashes of class "
PACKAGE_NAME " not supported");
void
zk_FIRSTKEY(attr_hash)
Net::ZooKeeper attr_hash
PREINIT:
zk_t *zk;
PPCODE:
zk = _zk_get_handle_inner(aTHX_ attr_hash);
if (!zk) {
Perl_croak(aTHX_ "invalid handle");
}
ST(0) = sv_2mortal(newSVpvn(zk_keys[0].name, zk_keys[0].name_len));
XSRETURN(1);
void
zk_NEXTKEY(attr_hash, attr_key)
Net::ZooKeeper attr_hash
SV *attr_key
PREINIT:
zk_t *zk;
char *key;
int i;
PPCODE:
zk = _zk_get_handle_inner(aTHX_ attr_hash);
if (!zk) {
Perl_croak(aTHX_ "invalid handle");
}
key = SvPV_nolen(attr_key);
for (i = 0; i < NUM_KEYS; ++i) {
if (strcaseEQ(key, zk_keys[i].name)) {
++i;
break;
}
}
if (i < NUM_KEYS) {
ST(0) = sv_2mortal(newSVpvn(zk_keys[i].name, zk_keys[i].name_len));
XSRETURN(1);
}
else {
XSRETURN_EMPTY;
}
void
zk_SCALAR(attr_hash)
Net::ZooKeeper attr_hash
PPCODE:
XSRETURN_YES;