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1145
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1 **************************************************
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2 * System Call: F$Sleep
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3 *
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4 * Function: Put the calling process to sleep
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5 *
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6 * Input: X = Sleep time in ticks (0 = forever)
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7 *
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8 * Output: X = Decremented by the number of ticks that the process slept
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9 *
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10 * Error: CC = C bit set; B = error code
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11 *
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12 FSleep pshs cc preserve interupt status
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13 ldx <D.Proc Get current process pointer
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14
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15 * F$Sleep bug fix. Check if we're in system state. If so return because you
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16 * should never sleep in system state.
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17 cmpx <D.SysPrc is it system process?
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18 beq SkpSleep skip sleep call
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19 orcc #IntMasks disable interupts
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20 lda P$Signal,x get pending signal
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21 beq L0722 none there, skip ahead
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22 deca wakeup signal?
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23 bne L0715 no, skip ahead
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24 sta P$Signal,x clear pending signal so we can wake up process
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25 L0715
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26 IFNE H6309
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27 aim #^Suspend,P$State,x
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28 ELSE
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1239
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29 lda P$State,x
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30 anda #^Suspend
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31 sta P$State,x
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1145
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32 ENDC
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33 L071B puls cc
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34 os9 F$AProc activate the process
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35 bra L0780
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36 L0722 ldd R$X,u get callers X (contains sleep tick count)
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37 beq L076D done, wake it up
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1239
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38 IFNE H6309
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1145
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39 decd subtract 1 from tick count
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40 ELSE
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1239
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41 subd #$0001
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1145
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42 ENDC
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43 std R$X,u save it back
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44 beq L071B zero, wake up process
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45 pshs x,y
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46 ldx #(D.SProcQ-P$Queue)
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47 L0732 std R$X,u
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48 stx 2,s
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49 ldx P$Queue,x
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50 beq L074F
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51 IFNE H6309
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52 tim #TimSleep,P$State,x
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53 ELSE
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1239
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54 lda P$State,x
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55 bita #TimSleep
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1145
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56 ENDC
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57 beq L074F
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58 ldy P$SP,x get process stack pointer
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59 ldd R$X,u
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60 subd R$X,y
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61 bcc L0732
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62 IFNE H6309
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63 negd
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64 ELSE
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65 nega
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66 negb
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1258
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67 sbca #0
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1145
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68 ENDC
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69 std R$X,y
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70 L074F puls y,x
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71 IFNE H6309
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72 oim #TimSleep,P$State,x
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73 ELSE
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1239
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74 lda P$State,x
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75 ora #TimSleep
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76 sta P$State,x
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1145
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77 ENDC
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78 ldd P$Queue,y
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79 stx P$Queue,y
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80 std P$Queue,x
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81 ldx R$X,u
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82 bsr L0780
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83 stx R$X,u
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84 ldx <D.Proc
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85 IFNE H6309
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86 aim #^TimSleep,P$State,x
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87 ELSE
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1239
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88 lda P$State,x
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89 anda #^TimSleep
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90 sta P$State,x
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1145
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91 ENDC
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92 SkpSleep puls cc,pc
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93
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94 L076D ldx #D.SProcQ-P$Queue
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95 L0770 leay ,x
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96 ldx P$Queue,x
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97 bne L0770
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98 ldx <D.Proc
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99 clra
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100 clrb
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101 stx P$Queue,y
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102 std P$Queue,x
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103 puls cc
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104
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105 L0780 pshs dp,x,y,u,pc
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106 L0782 leax <L079C,pc
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107 stx 7,s
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108 ldx <D.Proc
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109 ldb P$Task,x This is related to the 'one-byte hack'
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110 cmpb <D.SysTsk that stops OS9p1 from doing an F$AllTsk on
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111 beq L0792 _every_ system call.
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112 os9 F$DelTsk
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113 L0792 ldd P$SP,x
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114 IFNE H6309
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115 pshsw
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116 ENDC
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117 pshs cc,d
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118 sts P$SP,x
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119 os9 F$NProc
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120
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121 L079C pshs x
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122 ldx <D.Proc
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123 std P$SP,x
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124 clrb
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125 puls x,pc
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