FreeCalypso > hg > fc-magnetite

annotate src/gpf2/osl/os_sem_ir.c @ 597:f18b29e27be5

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First attempt at MCSI voice path automatic switching The function is implemented at the ACI level in both aci2 and aci3, successfully avoids triggering the DSP bug on the first call, but the shutdown of MCSI upon call completion is not working properly yet in either version.
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Mar 2019 22:18:35 +0000
parents 094ecae40880
children
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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_sem.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_SEM_TABLE_ENTRY SemTable[];
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17 extern unsigned os_time_to_tick_multiplier;
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18
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19 int
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20 ReleaseSemaphoreCB(NU_SEMAPHORE *SemCB)
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21 {
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22 if (NU_Release_Semaphore(SemCB) == NU_SUCCESS)
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23 return(OS_OK);
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24 else
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25 return(OS_ERROR);
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26 }
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27
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28 GLOBAL LONG
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29 os_ReleaseSemaphore(OS_HANDLE TaskHandle, OS_HANDLE SemHandle)
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30 {
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31 if (NU_Release_Semaphore(&SemTable[SemHandle].SemCB) == NU_SUCCESS)
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32 return(OS_OK);
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33 else
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34 return(OS_ERROR);
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35 }
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36
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37 int
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38 ObtainSemaphoreCB(NU_SEMAPHORE *SemCB, ULONG Timeout, USHORT wait_check)
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39 {
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40 UNSIGNED nu_timeout;
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41 STATUS sts;
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42 int ret;
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43
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44 ret = OS_OK;
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45 if (Timeout != OS_SUSPEND)
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46 nu_timeout = TIME_TO_SYSTEM_TICKS(Timeout);
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47 else if (wait_check == 1)
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48 nu_timeout = 1;
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49 else
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50 nu_timeout = NU_SUSPEND;
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51 for (;;) {
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52 sts = NU_Obtain_Semaphore(SemCB, nu_timeout);
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53 switch (sts) {
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54 case NU_SUCCESS:
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55 return(ret);
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56 case NU_INVALID_SEMAPHORE:
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57 return(OS_ERROR);
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58 case NU_INVALID_SUSPEND:
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59 nu_timeout = 0;
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60 continue;
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61 case NU_TIMEOUT:
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62 case NU_UNAVAILABLE:
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63 if (nu_timeout == 1 && wait_check == 1) {
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64 nu_timeout = NU_SUSPEND;
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65 ret = OS_WAITED;
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66 continue;
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67 }
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68 return(OS_TIMEOUT);
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69 default:
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70 /*
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71 * Disassembly reveals that the original code
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72 * has an endless loop here, the equivalent
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73 * of continue. My guess is that they simply
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74 * forgot the default case, and so control
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75 * falls onto the closing brace of the switch
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76 * and then onto the closing brace of the for
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77 * loop. But I prefer better error handling,
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78 * hence the present addition. - Space Falcon
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79 */
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80 return(OS_ERROR);
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81 }
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82 }
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83 }
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84
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85 GLOBAL LONG
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86 os_ObtainSemaphore(OS_HANDLE TaskHandle, OS_HANDLE SemHandle, ULONG Timeout)
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87 {
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88 if (SemHandle > MaxSemaphores)
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89 return(OS_ERROR);
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90 return ObtainSemaphoreCB(&SemTable[SemHandle].SemCB, Timeout, 0);
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91 }