2009-10-06 14:31:13 -04:00
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#ifndef _FS_CEPH_MSGPOOL
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#define _FS_CEPH_MSGPOOL
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#include "messenger.h"
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/*
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* we use memory pools for preallocating messages we may receive, to
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* avoid unexpected OOM conditions.
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*/
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struct ceph_msgpool {
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spinlock_t lock;
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int front_len; /* preallocated payload size */
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struct list_head msgs; /* msgs in the pool; each has 1 ref */
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int num, min; /* cur, min # msgs in the pool */
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bool blocking;
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wait_queue_head_t wait;
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};
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extern int ceph_msgpool_init(struct ceph_msgpool *pool,
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int front_len, int size, bool blocking);
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extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
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extern int ceph_msgpool_resv(struct ceph_msgpool *, int delta);
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2009-10-14 20:36:07 -04:00
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extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
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int front_len);
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2009-10-06 14:31:13 -04:00
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extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
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#endif
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