1 | /* |
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2 | * ITRON Message Buffer Manager |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <rtems/itron.h> |
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19 | |
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20 | #include <rtems/itron/msgbuffer.h> |
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21 | #include <rtems/itron/task.h> |
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22 | |
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23 | /* |
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24 | * cre_mbf - Create MessageBuffer |
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25 | */ |
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26 | |
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27 | ER cre_mbf( |
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28 | ID mbfid, |
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29 | T_CMBF *pk_cmbf |
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30 | ) |
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31 | { |
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32 | CORE_message_queue_Attributes the_msgq_attributes; |
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33 | ITRON_Message_buffer_Control *the_message_buffer; |
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34 | |
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35 | /* |
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36 | * Bad pointer to the attributes structure |
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37 | */ |
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38 | |
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39 | if ( !pk_cmbf ) |
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40 | return E_PAR; |
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41 | |
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42 | /* |
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43 | * Bits were set that were note defined. |
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44 | */ |
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45 | |
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46 | if (pk_cmbf->mbfatr & ~(TA_TPRI)) |
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47 | return E_RSATR; |
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48 | |
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49 | if (pk_cmbf->bufsz < 0 || pk_cmbf->maxmsz < 0) |
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50 | return E_PAR; |
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51 | |
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52 | if (pk_cmbf->bufsz < pk_cmbf->maxmsz) |
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53 | return E_PAR; |
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54 | |
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55 | _Thread_Disable_dispatch(); /* prevents deletion */ |
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56 | |
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57 | the_message_buffer = _ITRON_Message_buffer_Allocate(mbfid); |
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58 | if ( !the_message_buffer ) { |
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59 | _Thread_Enable_dispatch(); |
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60 | return _ITRON_Message_buffer_Clarify_allocation_id_error(mbfid); |
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61 | } |
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62 | |
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63 | if ( pk_cmbf->mbfatr & TA_TPRI ) |
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64 | the_msgq_attributes.discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_PRIORITY; |
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65 | else |
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66 | the_msgq_attributes.discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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67 | |
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68 | _CORE_message_queue_Initialize( |
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69 | &the_message_buffer->message_queue, |
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70 | &the_msgq_attributes, |
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71 | pk_cmbf->bufsz / pk_cmbf->maxmsz, |
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72 | pk_cmbf->maxmsz |
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73 | ); |
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74 | |
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75 | _ITRON_Objects_Open( &_ITRON_Message_buffer_Information, |
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76 | &the_message_buffer->Object ); |
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77 | |
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78 | /* |
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79 | * If multiprocessing were supported, this is where we would announce |
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80 | * the existence of the semaphore to the rest of the system. |
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81 | */ |
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82 | |
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83 | #if defined(RTEMS_MULTIPROCESSING) |
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84 | #endif |
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85 | |
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86 | _Thread_Enable_dispatch(); |
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87 | |
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88 | return E_OK; |
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89 | } |
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