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/*-------------------------------------------------------------------------
*
* pause.h
*
* Definitions for the Pause/Unpause Cluster handling
*
* IDENTIFICATION
* $$
*
*-------------------------------------------------------------------------
*/
#ifndef PAUSE_H
#define PAUSE_H
#include "storage/s_lock.h"
/* Shared memory area for management of cluster pause/unpause */
typedef struct {
int cl_holder_pid; /* pid of the process issuing CLUSTER PAUSE */
int cl_process_count; /* Number of processes undergoing txns */
slock_t cl_mutex; /* locks shared variables mentioned above */
} ClusterLockInfo;
extern ClusterLockInfo *ClustLinfo;
extern bool cluster_lock_held;
extern bool cluster_ex_lock_held;
extern void ClusterLockShmemInit(void);
extern Size ClusterLockShmemSize(void);
extern void AcquireClusterLock(bool exclusive);
extern void ReleaseClusterLock(bool exclusive);
extern void RequestClusterPause(bool pause, char *completionTag);
extern void PGXCCleanClusterLock(int code, Datum arg);
#endif
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