1 | /* |
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2 | * NOTE: The structure of the routines is identical to that of POSIX |
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3 | * Message_queues to leave the option of having unnamed message |
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4 | * queues at a future date. They are currently not part of the |
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5 | * POSIX standard but unnamed message_queues are. This is also |
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6 | * the reason for the apparently unnecessary tracking of |
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7 | * the process_shared attribute. [In addition to the fact that |
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8 | * it would be trivial to add pshared to the mq_attr structure |
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9 | * and have process private message queues.] |
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10 | * |
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11 | * This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open |
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12 | * time. |
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13 | * |
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14 | * $Id$ |
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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 <stdarg.h> |
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22 | |
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23 | #include <pthread.h> |
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24 | #include <limits.h> |
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25 | #include <errno.h> |
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26 | #include <fcntl.h> |
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27 | #include <mqueue.h> |
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28 | |
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29 | #include <rtems/system.h> |
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30 | #include <rtems/score/watchdog.h> |
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31 | #include <rtems/seterr.h> |
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32 | #include <rtems/posix/mqueue.h> |
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33 | #include <rtems/posix/time.h> |
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34 | |
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35 | /* |
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36 | * |
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37 | * 15.2.2 Close a Message Queue, P1003.1b-1993, p. 275 |
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38 | */ |
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39 | |
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40 | int mq_close( |
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41 | mqd_t mqdes |
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42 | ) |
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43 | { |
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44 | POSIX_Message_queue_Control *the_mq; |
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45 | POSIX_Message_queue_Control_fd *the_mq_fd; |
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46 | Objects_Locations location; |
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47 | |
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48 | the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location ); |
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49 | switch ( location ) { |
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50 | case OBJECTS_ERROR: |
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51 | rtems_set_errno_and_return_minus_one( EBADF ); |
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52 | case OBJECTS_REMOTE: |
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53 | _Thread_Dispatch(); |
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54 | return POSIX_MP_NOT_IMPLEMENTED(); |
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55 | rtems_set_errno_and_return_minus_one( EINVAL ); |
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56 | case OBJECTS_LOCAL: |
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57 | /* |
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58 | * First update the actual message queue to reflect this descriptor |
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59 | * being disassociated. This may result in the queue being really |
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60 | * deleted. |
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61 | */ |
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62 | |
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63 | the_mq = the_mq_fd->Queue; |
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64 | the_mq->open_count -= 1; |
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65 | _POSIX_Message_queue_Delete( the_mq ); |
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66 | |
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67 | /* |
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68 | * Now close this file descriptor. |
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69 | */ |
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70 | |
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71 | _Objects_Close( |
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72 | &_POSIX_Message_queue_Information_fds, &the_mq_fd->Object ); |
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73 | _POSIX_Message_queue_Free_fd( the_mq_fd ); |
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74 | |
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75 | _Thread_Enable_dispatch(); |
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76 | return 0; |
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77 | } |
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78 | return POSIX_BOTTOM_REACHED(); |
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79 | } |
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