mirror of https://github.com/schoebel/mars
82 lines
1.5 KiB
C
82 lines
1.5 KiB
C
// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
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#ifndef MARS_AIO_H
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#define MARS_AIO_H
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#include <linux/aio.h>
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#include <linux/syscalls.h>
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//#define USE_CLEVER_SYNC // TODO: NYI (should result in better write performance)
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#ifdef USE_CLEVER_SYNC
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#include "lib_pairing_heap.h"
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_PAIRING_HEAP_TYPEDEF(sync,);
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struct q_sync {
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struct pairing_heap_sync *heap[MARS_PRIO_NR];
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};
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#endif
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struct aio_mref_aspect {
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GENERIC_ASPECT(mref);
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#ifdef USE_CLEVER_SYNC
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struct pairing_heap_sync heap_head;
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#endif
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struct list_head io_head;
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long long start_jiffies;
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int resubmit;
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int alloc_len;
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bool do_dealloc;
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};
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struct aio_brick {
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MARS_BRICK(aio);
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// parameters
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int readahead;
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bool o_direct;
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bool o_fdsync;
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bool wait_during_fdsync;
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};
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struct aio_input {
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MARS_INPUT(aio);
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};
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struct aio_threadinfo {
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struct list_head mref_list[MARS_PRIO_NR];
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struct aio_output *output;
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struct task_struct *thread;
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wait_queue_head_t event;
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spinlock_t lock;
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bool terminated;
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atomic_t total_enqueue_count;
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atomic_t total_dequeue_count;
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};
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struct aio_output {
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MARS_OUTPUT(aio);
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// private
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struct file *filp;
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int fd; // FIXME: remove this!
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struct aio_threadinfo tinfo[3];
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aio_context_t ctxp;
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wait_queue_head_t fdsync_event;
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volatile bool fdsync_active;
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// statistics
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atomic_t total_read_count;
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atomic_t total_write_count;
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atomic_t total_alloc_count;
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atomic_t total_delay_count;
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atomic_t total_msleep_count;
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atomic_t total_fdsync_count;
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atomic_t total_fdsync_wait_count;
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atomic_t read_count;
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atomic_t write_count;
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atomic_t alloc_count;
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};
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MARS_TYPES(aio);
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#endif
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