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/* Copyright 2010 Codership Oy <http://www.codership.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//! @file declares symbols private to wsrep integration layer
#ifndef WSREP_PRIV_H
#define WSREP_PRIV_H
#include "wsrep_mysqld.h"
#include "../wsrep/wsrep_api.h"
#include <log.h>
#include <pthread.h>
#include <cstdio>
extern void wsrep_ready_set (my_bool x);
extern ssize_t wsrep_sst_prepare (void** msg);
extern int wsrep_sst_donate_cb (void* app_ctx,
void* recv_ctx,
const void* msg, size_t msg_len,
const wsrep_uuid_t* current_uuid,
wsrep_seqno_t current_seqno,
const char* state, size_t state_len,
bool bypass);
extern size_t guess_ip (char* buf, size_t buf_len);
extern size_t guess_address(char* buf, size_t buf_len);
extern wsrep_uuid_t local_uuid;
extern wsrep_seqno_t local_seqno;
/*! SST thread signals init thread about sst completion */
extern void wsrep_sst_complete(const wsrep_uuid_t* uuid, wsrep_seqno_t, bool);
extern void wsrep_notify_status (wsrep_member_status_t new_status,
const wsrep_view_info_t* view = 0);
namespace wsp {
class node_status
{
public:
node_status() : status(WSREP_MEMBER_UNDEFINED) {}
void set(wsrep_member_status_t new_status,
const wsrep_view_info_t* view = 0)
{
if (status != new_status || 0 != view)
{
wsrep_notify_status(new_status, view);
status = new_status;
}
}
wsrep_member_status_t get() const { return status; }
private:
wsrep_member_status_t status;
};
} /* namespace wsp */
extern wsp::node_status local_status;
namespace wsp {
/* A small class to run external programs. */
class process
{
private:
const char* const str_;
FILE* io_;
int err_;
pid_t pid_;
public:
/*! @arg type is a pointer to a null-terminated string which must contain
either the letter 'r' for reading or the letter 'w' for writing.
*/
process (const char* cmd, const char* type);
~process ();
FILE* pipe () { return io_; }
int error() { return err_; }
int wait ();
const char* cmd() { return str_; }
};
#ifdef REMOVED
class lock
{
pthread_mutex_t* const mtx_;
public:
lock (pthread_mutex_t* mtx) : mtx_(mtx)
{
int err = pthread_mutex_lock (mtx_);
if (err)
{
WSREP_ERROR("Mutex lock failed: %s", strerror(err));
abort();
}
}
virtual ~lock ()
{
int err = pthread_mutex_unlock (mtx_);
if (err)
{
WSREP_ERROR("Mutex unlock failed: %s", strerror(err));
abort();
}
}
inline void wait (pthread_cond_t* cond)
{
pthread_cond_wait (cond, mtx_);
}
private:
lock (const lock&);
lock& operator=(const lock&);
};
class monitor
{
int mutable refcnt;
pthread_mutex_t mutable mtx;
pthread_cond_t mutable cond;
public:
monitor() : refcnt(0)
{
pthread_mutex_init (&mtx, NULL);
pthread_cond_init (&cond, NULL);
}
~monitor()
{
pthread_mutex_destroy (&mtx);
pthread_cond_destroy (&cond);
}
void enter() const
{
lock l(&mtx);
while (refcnt)
{
l.wait(&cond);
}
refcnt++;
}
void leave() const
{
lock l(&mtx);
refcnt--;
if (refcnt == 0)
{
pthread_cond_signal (&cond);
}
}
private:
monitor (const monitor&);
monitor& operator= (const monitor&);
};
class critical
{
const monitor& mon;
public:
critical(const monitor& m) : mon(m) { mon.enter(); }
~critical() { mon.leave(); }
private:
critical (const critical&);
critical& operator= (const critical&);
};
#endif
class thd
{
class thd_init
{
public:
thd_init() { my_thread_init(); }
~thd_init() { my_thread_end(); }
}
init;
thd (const thd&);
thd& operator= (const thd&);
public:
thd(my_bool wsrep_on);
~thd();
THD* const ptr;
};
class string
{
public:
string() : string_(0) {}
void set(char* str) { if (string_) free (string_); string_ = str; }
~string() { set (0); }
private:
char* string_;
};
} // namespace wsrep
#endif /* WSREP_PRIV_H */
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