555 lines
15 KiB
C
555 lines
15 KiB
C
/*
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* $Id$
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*
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Copyright (c) 2015-2016 Chung, Hyung-Hwan. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAfRRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _STIO_H_
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#define _STIO_H_
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#include <stio-cmn.h>
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/**
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* The stio_ntime_t type defines a numeric time type expressed in the
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* number of milliseconds since the Epoch (00:00:00 UTC, Jan 1, 1970).
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*/
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typedef struct stio_ntime_t stio_ntime_t;
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struct stio_ntime_t
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{
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stio_intptr_t sec;
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stio_int32_t nsec; /* nanoseconds */
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};
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#if defined(_WIN32)
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typedef stio_uintptr_t qse_syshnd_t;
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#define STIO_SYSHND_INVALID (~(stio_uintptr_t)0)
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#else
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typedef int stio_syshnd_t;
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#define STIO_SYSHND_INVALID (-1)
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#endif
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typedef struct stio_devaddr_t stio_devaddr_t;
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struct stio_devaddr_t
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{
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int len;
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void* ptr;
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};
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#define STIO_CONST_SWAP16(x) \
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((stio_uint16_t)((((stio_uint16_t)(x) & (stio_uint16_t)0x00ffU) << 8) | \
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(((stio_uint16_t)(x) & (stio_uint16_t)0xff00U) >> 8) ))
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#define STIO_CONST_SWAP32(x) \
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((stio_uint32_t)((((stio_uint32_t)(x) & (stio_uint32_t)0x000000ffUL) << 24) | \
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(((stio_uint32_t)(x) & (stio_uint32_t)0x0000ff00UL) << 8) | \
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(((stio_uint32_t)(x) & (stio_uint32_t)0x00ff0000UL) >> 8) | \
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(((stio_uint32_t)(x) & (stio_uint32_t)0xff000000UL) >> 24) ))
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#if defined(STIO_ENDIAN_LITTLE)
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# define STIO_CONST_NTOH16(x) STIO_CONST_SWAP16(x)
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# define STIO_CONST_HTON16(x) STIO_CONST_SWAP16(x)
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# define STIO_CONST_NTOH32(x) STIO_CONST_SWAP32(x)
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# define STIO_CONST_HTON32(x) STIO_CONST_SWAP32(x)
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#elif defined(STIO_ENDIAN_BIG)
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# define STIO_CONST_NTOH16(x) (x)
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# define STIO_CONST_HTON16(x) (x)
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# define STIO_CONST_NTOH32(x) (x)
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# define STIO_CONST_HTON32(x) (x)
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#else
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# error UNKNOWN ENDIAN
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#endif
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/* ========================================================================= */
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typedef struct stio_t stio_t;
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typedef struct stio_dev_t stio_dev_t;
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typedef struct stio_dev_mth_t stio_dev_mth_t;
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typedef struct stio_dev_evcb_t stio_dev_evcb_t;
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typedef struct stio_wq_t stio_wq_t;
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typedef stio_intptr_t stio_iolen_t; /* NOTE: this is a signed type */
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enum stio_errnum_t
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{
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STIO_ENOERR,
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STIO_ENOIMPL,
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STIO_ESYSERR,
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STIO_EINTERN,
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STIO_ENOMEM,
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STIO_EINVAL,
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STIO_EEXIST,
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STIO_ENOENT,
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STIO_ENOSUP, /* not supported */
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STIO_EMFILE, /* too many open files */
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STIO_ENFILE,
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STIO_EAGAIN,
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STIO_ECONRF, /* connection refused */
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STIO_ECONRS, /* connection reset */
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STIO_ENOCAPA, /* no capability */
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STIO_ETMOUT, /* timed out */
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STIO_EPERM, /* operation not permitted */
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STIO_EDEVMAKE,
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STIO_EDEVERR,
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STIO_EDEVHUP
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};
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typedef enum stio_errnum_t stio_errnum_t;
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enum stio_stopreq_t
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{
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STIO_STOPREQ_NONE = 0,
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STIO_STOPREQ_TERMINATION,
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STIO_STOPREQ_WATCHER_ERROR
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};
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typedef enum stio_stopreq_t stio_stopreq_t;
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/* ========================================================================= */
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#define STIO_TMRIDX_INVALID ((stio_tmridx_t)-1)
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typedef stio_size_t stio_tmridx_t;
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typedef struct stio_tmrjob_t stio_tmrjob_t;
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typedef void (*stio_tmrjob_handler_t) (
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stio_t* stio,
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const stio_ntime_t* now,
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stio_tmrjob_t* tmrjob
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);
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struct stio_tmrjob_t
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{
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void* ctx;
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stio_ntime_t when;
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stio_tmrjob_handler_t handler;
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stio_tmridx_t* idxptr; /* pointer to the index holder */
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};
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/* ========================================================================= */
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struct stio_dev_mth_t
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{
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/* ------------------------------------------------------------------ */
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/* mandatory. called in stio_makedev() */
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int (*make) (stio_dev_t* dev, void* ctx);
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/* ------------------------------------------------------------------ */
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/* mandatory. called in stio_killdev(). also called in stio_makedev() upon
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* failure after make() success.
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*
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* when 'force' is 0, the return value of -1 causes the device to be a
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* zombie. the kill method is called periodically on a zombie device
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* until the method returns 0.
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*
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* when 'force' is 1, the called should not return -1. If it does, the
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* method is called once more only with the 'force' value of 2.
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*
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* when 'force' is 2, the device is destroyed regardless of the return value.
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*/
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int (*kill) (stio_dev_t* dev, int force);
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/* ------------------------------------------------------------------ */
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stio_syshnd_t (*getsyshnd) (stio_dev_t* dev); /* mandatory. called in stio_makedev() after successful make() */
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/* ------------------------------------------------------------------ */
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/* return -1 on failure, 0 if no data is availble, 1 otherwise.
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* when returning 1, *len must be sent to the length of data read.
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* if *len is set to 0, it's treated as EOF. */
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int (*read) (stio_dev_t* dev, void* data, stio_iolen_t* len, stio_devaddr_t* srcaddr);
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/* ------------------------------------------------------------------ */
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int (*write) (stio_dev_t* dev, const void* data, stio_iolen_t* len, const stio_devaddr_t* dstaddr);
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/* ------------------------------------------------------------------ */
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int (*ioctl) (stio_dev_t* dev, int cmd, void* arg);
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};
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struct stio_dev_evcb_t
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{
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/* return -1 on failure. 0 or 1 on success.
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* when 0 is returned, it doesn't attempt to perform actual I/O.
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* when 1 is returned, it attempts to perform actual I/O. */
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int (*ready) (stio_dev_t* dev, int events);
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/* return -1 on failure, 0 or 1 on success.
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* when 0 is returned, the main loop stops the attempt to read more data.
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* when 1 is returned, the main loop attempts to read more data without*/
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int (*on_read) (stio_dev_t* dev, const void* data, stio_iolen_t len, const stio_devaddr_t* srcaddr);
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/* return -1 on failure, 0 on success.
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* wrlen is the length of data written. it is the length of the originally
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* posted writing request for a stream device. For a non stream device, it
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* may be shorter than the originally posted length. */
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int (*on_write) (stio_dev_t* dev, stio_iolen_t wrlen, void* wrctx, const stio_devaddr_t* dstaddr);
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};
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struct stio_wq_t
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{
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stio_wq_t* next;
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stio_wq_t* prev;
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stio_iolen_t olen; /* original data length */
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stio_uint8_t* ptr; /* pointer to data */
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stio_iolen_t len; /* remaining data length */
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void* ctx;
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stio_dev_t* dev; /* back-pointer to the device */
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stio_tmridx_t tmridx;
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stio_devaddr_t dstaddr;
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};
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#define STIO_WQ_INIT(wq) ((wq)->next = (wq)->prev = (wq))
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#define STIO_WQ_TAIL(wq) ((wq)->prev)
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#define STIO_WQ_HEAD(wq) ((wq)->next)
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#define STIO_WQ_ISEMPTY(wq) (STIO_WQ_HEAD(wq) == (wq))
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#define STIO_WQ_ISNODE(wq,x) ((wq) != (x))
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#define STIO_WQ_ISHEAD(wq,x) (STIO_WQ_HEAD(wq) == (x))
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#define STIO_WQ_ISTAIL(wq,x) (STIO_WQ_TAIL(wq) == (x))
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#define STIO_WQ_NEXT(x) ((x)->next)
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#define STIO_WQ_PREV(x) ((x)->prev)
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#define STIO_WQ_LINK(p,x,n) do { \
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stio_wq_t* pp = (p), * nn = (n); \
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(x)->prev = (p); \
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(x)->next = (n); \
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nn->prev = (x); \
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pp->next = (x); \
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} while (0)
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#define STIO_WQ_UNLINK(x) do { \
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stio_wq_t* pp = (x)->prev, * nn = (x)->next; \
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nn->prev = pp; pp->next = nn; \
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} while (0)
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#define STIO_WQ_REPL(o,n) do { \
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stio_wq_t* oo = (o), * nn = (n); \
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nn->next = oo->next; \
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nn->next->prev = nn; \
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nn->prev = oo->prev; \
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nn->prev->next = nn; \
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} while (0)
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/* insert an item at the back of the queue */
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/*#define STIO_WQ_ENQ(wq,x) STIO_WQ_LINK(STIO_WQ_TAIL(wq), x, STIO_WQ_TAIL(wq)->next)*/
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#define STIO_WQ_ENQ(wq,x) STIO_WQ_LINK(STIO_WQ_TAIL(wq), x, wq)
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/* remove an item in the front from the queue */
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#define STIO_WQ_DEQ(wq) STIO_WQ_UNLINK(STIO_WQ_HEAD(wq))
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#define STIO_DEV_HEADERS \
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stio_t* stio; \
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stio_size_t dev_size; \
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int dev_capa; \
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stio_dev_mth_t* dev_mth; \
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stio_dev_evcb_t* dev_evcb; \
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stio_wq_t wq; \
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stio_dev_t* dev_prev; \
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stio_dev_t* dev_next
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struct stio_dev_t
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{
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STIO_DEV_HEADERS;
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};
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enum stio_dev_capa_t
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{
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STIO_DEV_CAPA_VIRTUAL = (1 << 0),
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STIO_DEV_CAPA_IN = (1 << 1),
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STIO_DEV_CAPA_OUT = (1 << 2),
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/* #STIO_DEV_CAPA_PRI is meaningful only if #STIO_DEV_CAPA_IN is set */
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STIO_DEV_CAPA_PRI = (1 << 3),
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STIO_DEV_CAPA_STREAM = (1 << 4),
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STIO_DEV_CAPA_OUT_QUEUED = (1 << 5),
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/* internal use only. never set this bit to the dev_capa field */
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STIO_DEV_CAPA_IN_DISABLED = (1 << 9),
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STIO_DEV_CAPA_IN_CLOSED = (1 << 10),
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STIO_DEV_CAPA_OUT_CLOSED = (1 << 11),
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STIO_DEV_CAPA_IN_WATCHED = (1 << 12),
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STIO_DEV_CAPA_OUT_WATCHED = (1 << 13),
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STIO_DEV_CAPA_PRI_WATCHED = (1 << 14), /**< can be set only if STIO_DEV_CAPA_IN_WATCHED is set */
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STIO_DEV_CAPA_ACTIVE = (1 << 15),
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STIO_DEV_CAPA_HALTED = (1 << 16),
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STIO_DEV_CAPA_ZOMBIE = (1 << 17)
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};
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typedef enum stio_dev_capa_t stio_dev_capa_t;
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enum stio_dev_watch_cmd_t
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{
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STIO_DEV_WATCH_START,
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STIO_DEV_WATCH_UPDATE,
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STIO_DEV_WATCH_RENEW, /* automatic update */
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STIO_DEV_WATCH_STOP
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};
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typedef enum stio_dev_watch_cmd_t stio_dev_watch_cmd_t;
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enum stio_dev_event_t
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{
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STIO_DEV_EVENT_IN = (1 << 0),
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STIO_DEV_EVENT_OUT = (1 << 1),
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STIO_DEV_EVENT_PRI = (1 << 2),
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STIO_DEV_EVENT_HUP = (1 << 3),
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STIO_DEV_EVENT_ERR = (1 << 4)
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};
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typedef enum stio_dev_event_t stio_dev_event_t;
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/* ========================================================================= */
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#ifdef __cplusplus
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extern "C" {
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#endif
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STIO_EXPORT stio_t* stio_open (
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stio_mmgr_t* mmgr,
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stio_size_t xtnsize,
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stio_size_t tmrcapa, /**< initial timer capacity */
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stio_errnum_t* errnum
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);
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STIO_EXPORT void stio_close (
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stio_t* stio
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);
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STIO_EXPORT int stio_init (
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stio_t* stio,
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stio_mmgr_t* mmgr,
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stio_size_t tmrcapa
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);
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STIO_EXPORT void stio_fini (
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stio_t* stio
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);
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STIO_EXPORT int stio_exec (
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stio_t* stio
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);
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STIO_EXPORT int stio_loop (
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stio_t* stio
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);
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STIO_EXPORT void stio_stop (
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stio_t* stio,
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stio_stopreq_t stopreq
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);
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STIO_EXPORT stio_dev_t* stio_makedev (
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stio_t* stio,
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stio_size_t dev_size,
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stio_dev_mth_t* dev_mth,
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stio_dev_evcb_t* dev_evcb,
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void* make_ctx
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);
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STIO_EXPORT void stio_killdev (
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stio_t* stio,
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stio_dev_t* dev
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);
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STIO_EXPORT int stio_dev_ioctl (
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stio_dev_t* dev,
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int cmd,
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void* arg
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);
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STIO_EXPORT int stio_dev_watch (
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stio_dev_t* dev,
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stio_dev_watch_cmd_t cmd,
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/** 0 or bitwise-ORed of #STIO_DEV_EVENT_IN and #STIO_DEV_EVENT_OUT */
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int events
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);
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STIO_EXPORT int stio_dev_read (
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stio_dev_t* dev,
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int enabled
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);
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/**
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* The stio_dev_write() function posts a writing request.
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* It attempts to write data immediately if there is no pending requests.
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* If writing fails, it returns -1. If writing succeeds, it calls the
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* on_write callback. If the callback fails, it returns -1. If the callback
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* succeeds, it returns 1. If no immediate writing is possible, the request
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* is enqueued to a pending request list. If enqueing gets successful,
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* it returns 0. otherwise it returns -1.
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*/
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STIO_EXPORT int stio_dev_write (
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stio_dev_t* dev,
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const void* data,
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stio_iolen_t len,
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void* wrctx,
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const stio_devaddr_t* dstaddr
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);
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STIO_EXPORT int stio_dev_timedwrite (
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stio_dev_t* dev,
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const void* data,
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stio_iolen_t len,
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const stio_ntime_t* tmout,
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void* wrctx,
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const stio_devaddr_t* dstaddr
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);
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STIO_EXPORT void stio_dev_halt (
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stio_dev_t* dev
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);
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/* ========================================================================= */
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#define stio_inittime(x,s,ns) (((x)->sec = (s)), ((x)->nsec = (ns)))
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#define stio_cleartime(x) stio_inittime(x,0,0)
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#define stio_cmptime(x,y) \
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(((x)->sec == (y)->sec)? ((x)->nsec - (y)->nsec): \
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((x)->sec - (y)->sec))
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/* if time has been normalized properly, nsec must be equal to or
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* greater than 0. */
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#define stio_isnegtime(x) ((x)->sec < 0)
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#define stio_ispostime(x) ((x)->sec > 0 || ((x)->sec == 0 && (x)->nsec > 0))
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#define stio_iszerotime(x) ((x)->sec == 0 && (x)->nsec == 0)
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/**
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* The stio_gettime() function gets the current time.
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*/
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STIO_EXPORT void stio_gettime (
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stio_ntime_t* nt
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);
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/**
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* The stio_addtime() function adds x and y and stores the result in z
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*/
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STIO_EXPORT void stio_addtime (
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const stio_ntime_t* x,
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const stio_ntime_t* y,
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stio_ntime_t* z
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);
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/**
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* The stio_subtime() function subtract y from x and stores the result in z.
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*/
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STIO_EXPORT void stio_subtime (
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const stio_ntime_t* x,
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const stio_ntime_t* y,
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stio_ntime_t* z
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);
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/**
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* The stio_instmrjob() function schedules a new event.
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*
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* \return #STIO_TMRIDX_INVALID on failure, valid index on success.
|
|
*/
|
|
|
|
STIO_EXPORT stio_tmridx_t stio_instmrjob (
|
|
stio_t* stio,
|
|
const stio_tmrjob_t* job
|
|
);
|
|
|
|
STIO_EXPORT stio_tmridx_t stio_updtmrjob (
|
|
stio_t* stio,
|
|
stio_tmridx_t index,
|
|
const stio_tmrjob_t* job
|
|
);
|
|
|
|
STIO_EXPORT void stio_deltmrjob (
|
|
stio_t* stio,
|
|
stio_tmridx_t index
|
|
);
|
|
|
|
/**
|
|
* The stio_gettmrjob() function returns the
|
|
* pointer to the registered event at the given index.
|
|
*/
|
|
STIO_EXPORT stio_tmrjob_t* stio_gettmrjob (
|
|
stio_t* stio,
|
|
stio_tmridx_t index
|
|
);
|
|
|
|
STIO_EXPORT int stio_gettmrjobdeadline (
|
|
stio_t* stio,
|
|
stio_tmridx_t index,
|
|
stio_ntime_t* deadline
|
|
);
|
|
|
|
/* ========================================================================= */
|
|
|
|
|
|
#if defined(STIO_HAVE_UINT16_T)
|
|
STIO_EXPORT stio_uint16_t stio_ntoh16 (
|
|
stio_uint16_t x
|
|
);
|
|
|
|
STIO_EXPORT stio_uint16_t stio_hton16 (
|
|
stio_uint16_t x
|
|
);
|
|
#endif
|
|
|
|
#if defined(STIO_HAVE_UINT32_T)
|
|
STIO_EXPORT stio_uint32_t stio_ntoh32 (
|
|
stio_uint32_t x
|
|
);
|
|
|
|
STIO_EXPORT stio_uint32_t stio_hton32 (
|
|
stio_uint32_t x
|
|
);
|
|
#endif
|
|
|
|
#if defined(STIO_HAVE_UINT64_T)
|
|
STIO_EXPORT stio_uint64_t stio_ntoh64 (
|
|
stio_uint64_t x
|
|
);
|
|
|
|
STIO_EXPORT stio_uint64_t stio_hton64 (
|
|
stio_uint64_t x
|
|
);
|
|
#endif
|
|
|
|
#if defined(STIO_HAVE_UINT128_T)
|
|
STIO_EXPORT stio_uint128_t stio_ntoh128 (
|
|
stio_uint128_t x
|
|
);
|
|
|
|
STIO_EXPORT stio_uint128_t stio_hton128 (
|
|
stio_uint128_t x
|
|
);
|
|
#endif
|
|
|
|
/* ========================================================================= */
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif
|