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/* -*- c-basic-offset: 2 -*- */
/*
Copyright(C) 2015 Kouhei Sutou <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*/
#include "mrn_context_pool.hpp"
#include "mrn_lock.hpp"
#include <time.h>
namespace mrn {
// for debug
#define MRN_CLASS_NAME "mrn::ContextPool::Impl"
class ContextPool::Impl {
public:
Impl(mysql_mutex_t *mutex)
: mutex_(mutex),
pool_(NULL),
last_pull_time_(0) {
}
~Impl(void) {
clear();
}
grn_ctx *pull(void) {
MRN_DBUG_ENTER_METHOD();
grn_ctx *ctx = NULL;
{
time_t now;
time(&now);
mrn::Lock lock(mutex_);
if (pool_) {
ctx = static_cast<grn_ctx *>(pool_->data);
list_pop(pool_);
if ((uint) (now - last_pull_time_) >= CLEAR_THREATHOLD_IN_SECONDS) {
clear();
}
}
last_pull_time_ = now;
}
if (!ctx) {
ctx = grn_ctx_open(0);
}
DBUG_RETURN(ctx);
}
void release(grn_ctx *ctx) {
MRN_DBUG_ENTER_METHOD();
{
mrn::Lock lock(mutex_);
list_push(pool_, ctx);
grn_ctx_use(ctx, NULL);
}
DBUG_VOID_RETURN;
}
private:
static const int CLEAR_THREATHOLD_IN_SECONDS = 60 * 5;
mysql_mutex_t *mutex_;
LIST *pool_;
time_t last_pull_time_;
void clear(void) {
MRN_DBUG_ENTER_METHOD();
while (pool_) {
grn_ctx *ctx = static_cast<grn_ctx *>(pool_->data);
grn_ctx_close(ctx);
list_pop(pool_);
}
DBUG_VOID_RETURN;
}
};
// For debug
#undef MRN_CLASS_NAME
#define MRN_CLASS_NAME "mrn::ContextPool"
ContextPool::ContextPool(mysql_mutex_t *mutex)
: impl_(new Impl(mutex)) {
}
ContextPool::~ContextPool(void) {
delete impl_;
}
grn_ctx *ContextPool::pull(void) {
MRN_DBUG_ENTER_METHOD();
grn_ctx *ctx = impl_->pull();
DBUG_RETURN(ctx);
}
void ContextPool::release(grn_ctx *ctx) {
MRN_DBUG_ENTER_METHOD();
impl_->release(ctx);
DBUG_VOID_RETURN;
}
}
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