async.h
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上传日期:2008-01-29
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- /*
- * Copyright 2003 by Texas Instruments Incorporated.
- * All rights reserved. Property of Texas Instruments Incorporated.
- * Restricted rights to use, duplicate or disclose this code are
- * granted through contract.
- *
- */
- /* "@(#) DDK 1.11.00.00 11-04-03 (ddk-b13)" */
- /*
- * ======== async.h ========
- *
- * This file defines the async macros to GIO.
- *
- * ASYNC_abort
- * ASYNC_control
- * ASYNC_create
- * ASYNC_delete
- * ASYNC_flush
- * ASYNC_read
- * ASYNC_write
- *
- */
- #ifndef ASYNC_
- #define ASYNC_
- #include <gio.h>
- #include <iom.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- * ======== ASYNC_abort ========
- * Abort all input and output. ASYNC_abort() is a synchronous call and only
- * returns when all I/O has been successfully aborted.
- */
- #define ASYNC_abort(gioChan)
- GIO_abort(gioChan)
- /*
- * ======== ASYNC_control ========
- * This is a direct call down into the mini driver.
- */
- #define ASYNC_control(gioChan, cmd, args)
- GIO_control(gioChan, cmd, args)
- /*
- * ======== ASYNC_create ========
- * ASYNC_create() allocates and initializes an GIO_Obj structure. ASYNC_create
- * returns a non-NULL GIO_Handle object on success and NULL for failure.
- * The 'name' parameter is used to find a matching name in the device
- * table. Associated IOM_Fxns table and params structure are then used
- * to create a channel for that device. The 'attrs->nPackets' parameter
- * specifies the number of asynchronous I/O calls that can be outstanding.
- * The status field is the address where a device status is returned, ignored
- * if status is specified as NULL.
- */
- #define ASYNC_create(name, mode, status, optArgs, attrs)
- GIO_create(name, mode, status, optArgs, attrs)
- /*
- * ======== ASYNC_delete ========
- * ASYNC_delete() frees up channel resources.
- */
- #define ASYNC_delete(giochan)
- GIO_delete(gioChan)
- /*
- * ======== ASYNC_flush ========
- * Flush all input and output. Flush drains all output buffers and discards
- * any pending input. ASYNC_flush() is synchronous and only returns when
- * all I/O has been successfully flushed.
- */
- #define ASYNC_flush(gioChan)
- GIO_flush(gioChan)
- /*
- * ======== ASYNC_read ========
- * Asynchronous read command. ASYNC_read() returns 'IOM_PENDING' if
- * I/O was successfully queued and 'IOM_COMPLETED' if I/O was able to
- * complete immediately.
- */
- #define ASYNC_read(gioChan, bufp, psize, appCallback)
- GIO_submit(gioChan, IOM_READ, bufp, psize, appCallback)
- /*
- * ======== ASYNC_write ========
- * Asynchronous write command. Same semantics as ASYNC_read() above.
- */
- #define ASYNC_write(gioChan, bufp, psize, appCallback)
- GIO_submit(gioChan, IOM_WRITE, bufp, psize, appCallback)
- #ifdef __cplusplus
- }
- #endif /* extern "C" */
- #endif /* ASYNC_ */