1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Function queues I/O request described by buffer pointed by aiocb |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * Copyright 2010, Alin Rus <alin.codejunkie@gmail.com> |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.org/license/LICENSE. |
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14 | */ |
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15 | |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <aio.h> |
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22 | #include <errno.h> |
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23 | #include <fcntl.h> |
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24 | #include <rtems/posix/aio_misc.h> |
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25 | #include <rtems/system.h> |
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26 | #include <rtems/seterr.h> |
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27 | #include <stdlib.h> |
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28 | #include <limits.h> |
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29 | |
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30 | /* |
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31 | * aio_write |
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32 | * |
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33 | * Asynchronous write to a file |
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34 | * |
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35 | * Input parameters: |
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36 | * aiocbp - asynchronous I/O control block |
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37 | * |
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38 | * Output parameters: |
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39 | * -1 - request could not be enqueued |
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40 | * - FD not opened for write |
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41 | * - invalid aio_reqprio or aio_offset or |
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42 | * aio_nbytes |
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43 | * - not enough memory |
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44 | * 0 - otherwise |
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45 | */ |
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46 | |
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47 | int |
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48 | aio_write (struct aiocb *aiocbp) |
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49 | { |
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50 | rtems_aio_request *req; |
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51 | int mode; |
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52 | |
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53 | mode = fcntl (aiocbp->aio_fildes, F_GETFL); |
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54 | if (!(((mode & O_ACCMODE) == O_WRONLY) || ((mode & O_ACCMODE) == O_RDWR))) |
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55 | rtems_aio_set_errno_return_minus_one (EBADF, aiocbp); |
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56 | |
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57 | if (aiocbp->aio_reqprio < 0 || aiocbp->aio_reqprio > AIO_PRIO_DELTA_MAX) |
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58 | rtems_aio_set_errno_return_minus_one (EINVAL, aiocbp); |
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59 | |
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60 | if (aiocbp->aio_offset < 0) |
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61 | rtems_aio_set_errno_return_minus_one (EINVAL, aiocbp); |
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62 | |
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63 | req = malloc (sizeof (rtems_aio_request)); |
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64 | if (req == NULL) |
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65 | rtems_aio_set_errno_return_minus_one (EAGAIN, aiocbp); |
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66 | |
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67 | req->aiocbp = aiocbp; |
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68 | req->aiocbp->aio_lio_opcode = LIO_WRITE; |
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69 | |
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70 | return rtems_aio_enqueue (req); |
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71 | } |
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