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annotate src/gpf2/osl/os_com_ir.c @ 489:f89439ce0d45

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OSL: os_com_ir.c compiles
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 22 Jun 2018 07:00:42 +0000
parents 91e8dac34ada
children a996d0429c59
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * This C module is a reconstruction based on the disassembly of
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3 * os_com.obj in frame_na7_db_ir.lib from the Leonardo package.
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4 */
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5
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6 /* set of included headers from COFF symtab: */
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7 #include <stdio.h>
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8 #include <string.h>
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9 #include "nucleus.h"
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10 #include "typedefs.h"
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11 #include "os.h"
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12 #include "gdi.h"
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13 #include "os_types.h"
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14 #include "os_glob.h"
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15
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16 extern T_OS_COM_TABLE_ENTRY ComTable[];
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17 extern unsigned os_tick_to_time_multiplier;
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18
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19 extern int ObtainSemaphoreCB(NU_SEMAPHORE *SemCB, ULONG Timeout,
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20 USHORT wait_check);
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21 extern int ReleaseSemaphoreCB(NU_SEMAPHORE *SemCB);
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22
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23 GLOBAL LONG
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24 os_SendToQueue(OS_HANDLE TaskHandle, OS_HANDLE ComHandle, USHORT Priority,
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25 ULONG Suspend, OS_QDATA *Msg)
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26 {
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27 T_OS_COM_TABLE_ENTRY *pTable;
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28 T_QDATA_ELEMENT *elem;
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29 T_QUEUE *queue;
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30 int ret;
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31 NU_SEMAPHORE *CBPtr;
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32 USHORT watmark;
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33
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34 if (ComHandle <= 0 || ComHandle > MaxCommunications)
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35 return(OS_INVALID_QUEUE);
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36 pTable = ComTable + ComHandle;
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37 if (!pTable->Name[0])
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38 return(OS_INVALID_QUEUE);
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39 CBPtr = &pTable->FreeSemCB;
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40 ret = ObtainSemaphoreCB(CBPtr, Suspend, 1);
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41 if (ret == OS_ERROR || ret == OS_TIMEOUT)
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42 return(ret);
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43 TCT_System_Protect();
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44 elem = pTable->pFreeElement;
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45 pTable->pFreeElement = elem->pNext;
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46 memcpy(&elem->Data, Msg, sizeof(OS_QDATA));
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47 queue = &pTable->Queue[Priority - OS_MIN_PRIORITY];
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48 *queue->pWrite++ = &elem->Data;
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49 if (queue->pWrite - queue->pStart >= pTable->Entries + 1)
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50 queue->pWrite = queue->pStart;
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51 watmark = pTable->Entries - CBPtr->sm_semaphore_count;
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52 if (pTable->MaxUsed < watmark)
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53 pTable->MaxUsed = watmark;
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54 TCT_System_Unprotect();
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55 ReleaseSemaphoreCB(&pTable->UsedSemCB);
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56 return(ret);
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57 }
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58
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59 GLOBAL LONG
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60 os_ReceiveFromQueue(OS_HANDLE TaskHandle, OS_HANDLE ComHandle,
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61 OS_QDATA *Msg, ULONG Timeout)
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62 {
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63 T_QDATA_ELEMENT *pElem;
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64 UNSIGNED c_time;
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65 int ret;
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66 USHORT i;
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67 T_QUEUE *pQueue;
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68 T_OS_COM_TABLE_ENTRY *pTable;
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69
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70 pTable = ComTable + ComHandle;
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71 if (!pTable->Name[0])
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72 return(OS_ERROR);
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73 pTable->current_msg.type = 0;
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74 ret = ObtainSemaphoreCB(&pTable->UsedSemCB, Timeout, 0);
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75 if (ret == OS_ERROR || ret == OS_TIMEOUT)
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76 return(ret);
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77 TCT_System_Protect();
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78 for (i = OS_MAX_PRIORITY; i >= OS_MIN_PRIORITY; i--) {
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79 pQueue = &pTable->Queue[i - OS_MIN_PRIORITY];
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80 if (pQueue->pWrite != pQueue->pRead)
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81 break;
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82 }
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83 if (i < OS_MIN_PRIORITY) {
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84 TCT_System_Unprotect();
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85 ReleaseSemaphoreCB(&pTable->FreeSemCB);
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86 return(OS_ERROR);
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87 }
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88 memcpy(Msg, *pQueue->pRead, sizeof(OS_QDATA));
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89 pElem = (T_QDATA_ELEMENT *)*pQueue->pRead++;
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90 pElem->Data.data16 = 0;
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91 pElem->pNext = pTable->pFreeElement;
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92 pTable->pFreeElement = pElem;
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93 if (pQueue->pRead - pQueue->pStart >= pTable->Entries + 1)
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94 pQueue->pRead = pQueue->pStart;
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95 pTable->current_msg.type = Msg->data16;
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96 pTable->current_msg.opc = Msg->data32;
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97 c_time = NU_Retrieve_Clock();
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98 pTable->current_msg.time = SYSTEM_TICKS_TO_TIME(c_time);
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99 pTable->current_msg.ptr = Msg->ptr;
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100 TCT_System_Unprotect();
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101 ReleaseSemaphoreCB(&pTable->FreeSemCB);
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102 return(OS_OK);
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103 }