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annotate src/gpf/osl/os_com_ir.c @ 52:1eb391057168

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author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Jul 2018 22:49:10 +0000
parents 8b2a9a374324
children
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6
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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 TC_PROTECT TCD_System_Protect;
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17 extern VOID TCT_Protect(TC_PROTECT *protect);
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18 extern VOID TCT_Unprotect(VOID);
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19 extern VOID TCT_Unprotect_Specific(TC_PROTECT *protect);
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20
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21 #define My_System_Protect() TCT_Protect(&TCD_System_Protect)
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22 #define My_System_Unprotect() TCT_Unprotect_Specific(&TCD_System_Protect)
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23
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24 extern T_OS_COM_TABLE_ENTRY ComTable[];
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25 extern unsigned os_tick_to_time_multiplier;
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26
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27 extern int ObtainSemaphoreCB(NU_SEMAPHORE *SemCB, ULONG Timeout,
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28 USHORT wait_check);
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29 extern int ReleaseSemaphoreCB(NU_SEMAPHORE *SemCB);
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30
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31 GLOBAL LONG
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32 os_SendToQueue(OS_HANDLE TaskHandle, OS_HANDLE ComHandle, USHORT Priority,
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33 ULONG Suspend, OS_QDATA *Msg)
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34 {
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35 T_OS_COM_TABLE_ENTRY *pTable;
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36 T_QDATA_ELEMENT *elem;
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37 T_QUEUE *queue;
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38 int ret;
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39 NU_SEMAPHORE *CBPtr;
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40 USHORT watmark;
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41
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42 if (ComHandle <= 0 || ComHandle > MaxCommunications)
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43 return(OS_INVALID_QUEUE);
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44 pTable = ComTable + ComHandle;
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45 if (!pTable->Name[0])
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46 return(OS_INVALID_QUEUE);
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47 CBPtr = &pTable->FreeSemCB;
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48 ret = ObtainSemaphoreCB(CBPtr, Suspend, 1);
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49 if (ret == OS_ERROR || ret == OS_TIMEOUT)
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50 return(ret);
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51 My_System_Protect();
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52 elem = pTable->pFreeElement;
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53 pTable->pFreeElement = elem->pNext;
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54 memcpy(&elem->Data, Msg, sizeof(OS_QDATA));
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55 queue = &pTable->Queue[Priority - OS_MIN_PRIORITY];
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56 *queue->pWrite++ = &elem->Data;
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57 if (queue->pWrite - queue->pStart >= pTable->Entries + 1)
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58 queue->pWrite = queue->pStart;
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59 watmark = pTable->Entries - CBPtr->sm_semaphore_count;
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60 if (pTable->MaxUsed < watmark)
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61 pTable->MaxUsed = watmark;
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62 My_System_Unprotect();
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63 ReleaseSemaphoreCB(&pTable->UsedSemCB);
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64 return(ret);
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65 }
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66
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67 GLOBAL LONG
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68 os_ReceiveFromQueue(OS_HANDLE TaskHandle, OS_HANDLE ComHandle,
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69 OS_QDATA *Msg, ULONG Timeout)
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70 {
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71 T_QDATA_ELEMENT *pElem;
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72 UNSIGNED c_time;
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73 int ret;
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74 USHORT i;
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75 T_QUEUE *pQueue;
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76 T_OS_COM_TABLE_ENTRY *pTable;
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77
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78 pTable = ComTable + ComHandle;
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79 if (!pTable->Name[0])
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80 return(OS_ERROR);
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81 pTable->current_msg.type = 0;
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82 ret = ObtainSemaphoreCB(&pTable->UsedSemCB, Timeout, 0);
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83 if (ret == OS_ERROR || ret == OS_TIMEOUT)
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84 return(ret);
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85 My_System_Protect();
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86 for (i = OS_MAX_PRIORITY; i >= OS_MIN_PRIORITY; i--) {
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87 pQueue = &pTable->Queue[i - OS_MIN_PRIORITY];
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88 if (pQueue->pWrite != pQueue->pRead)
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89 break;
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90 }
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91 if (i < OS_MIN_PRIORITY) {
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92 My_System_Unprotect();
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93 ReleaseSemaphoreCB(&pTable->FreeSemCB);
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94 return(OS_ERROR);
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95 }
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96 memcpy(Msg, *pQueue->pRead, sizeof(OS_QDATA));
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97 pElem = (T_QDATA_ELEMENT *)*pQueue->pRead++;
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98 pElem->Data.data16 = 0;
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99 pElem->pNext = pTable->pFreeElement;
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100 pTable->pFreeElement = pElem;
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101 if (pQueue->pRead - pQueue->pStart >= pTable->Entries + 1)
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102 pQueue->pRead = pQueue->pStart;
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103 pTable->current_msg.type = Msg->data16;
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104 pTable->current_msg.opc = Msg->data32;
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105 c_time = NU_Retrieve_Clock();
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106 pTable->current_msg.time = SYSTEM_TICKS_TO_TIME(c_time);
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107 pTable->current_msg.ptr = Msg->ptr;
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108 My_System_Unprotect();
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109 ReleaseSemaphoreCB(&pTable->FreeSemCB);
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110 return(OS_OK);
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111 }