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152
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1 struct coro1 {
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2
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3 struct promise_type {
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4
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5 promise_type () : vv(-1) { PRINT ("Promise def. CTOR"); }
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6 promise_type (int __x) : vv(__x) { PRINTF ("Created Promise with %d\n",__x); }
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7 promise_type (int __x, int& __y, int&& __z)
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8 : vv(__x), v2(__y), v3(__z)
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9 { PRINTF ("Created Promise with %d, %d, %d\n", __x, __y, __z); }
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10
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11 ~promise_type() { PRINT ("Destroyed Promise"); }
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12
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13 auto get_return_object () {
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14 PRINT ("get_return_object: handle from promise");
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15 return handle_type::from_promise (*this);
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16 }
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17
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18 auto initial_suspend () {
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19 PRINT ("get initial_suspend (always)");
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20 return suspend_always_prt{};
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21 }
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22 auto final_suspend () {
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23 PRINT ("get final_suspend (always)");
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24 return suspend_always_prt{};
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25 }
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26
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27 #ifdef USE_AWAIT_TRANSFORM
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28
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29 auto await_transform (int v) {
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30 PRINTF ("await_transform an int () %d\n",v);
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31 return suspend_always_intprt (v);
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32 }
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33
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34 auto await_transform (long v) {
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35 PRINTF ("await_transform a long () %ld\n",v);
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36 return suspend_always_longprtsq (v);
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37 }
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38
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39 #endif
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40
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41 auto yield_value (int v) {
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42 PRINTF ("yield_value (%d)\n", v);
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43 vv = v;
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44 return suspend_always_prt{};
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45 }
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46
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47 void return_value (int v) {
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48 PRINTF ("return_value (%d)\n", v);
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49 vv = v;
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50
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51 }
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52
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53 void unhandled_exception() { PRINT ("** unhandled exception"); }
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54
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55 int get_value () { return vv; }
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56 int get_v2 () { return v2; }
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57 int get_v3 () { return v3; }
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58
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59 private:
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60 int vv;
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61 int v2;
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62 int v3;
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63 };
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64
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65 using handle_type = coro::coroutine_handle<coro1::promise_type>;
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66 handle_type handle;
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67 coro1 () : handle(0) {}
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68 coro1 (handle_type _handle)
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69 : handle(_handle) {
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70 PRINT("Created coro1 object from handle");
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71 }
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72 coro1 (const coro1 &) = delete; // no copying
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73 coro1 (coro1 &&s) : handle(s.handle) {
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74 s.handle = nullptr;
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75 PRINT("coro1 mv ctor ");
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76 }
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77 coro1 &operator = (coro1 &&s) {
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78 handle = s.handle;
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79 s.handle = nullptr;
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80 PRINT("coro1 op= ");
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81 return *this;
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82 }
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83 ~coro1() {
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84 PRINT("Destroyed coro1");
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85 if ( handle )
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86 handle.destroy();
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87 }
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88
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89 // Some awaitables to use in tests.
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90 // With progress printing for debug.
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91 struct suspend_never_prt {
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92 bool await_ready() const noexcept { return true; }
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93 void await_suspend(handle_type) const noexcept { PRINT ("susp-never-susp");}
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94 void await_resume() const noexcept { PRINT ("susp-never-resume");}
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95 };
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96
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97 struct suspend_always_prt {
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98 bool await_ready() const noexcept { return false; }
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99 void await_suspend(handle_type) const noexcept { PRINT ("susp-always-susp");}
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100 void await_resume() const noexcept { PRINT ("susp-always-resume");}
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101 ~suspend_always_prt() { PRINT ("susp-always-dtor"); }
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102 };
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103
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104 struct suspend_always_intprt {
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105 int x;
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106 suspend_always_intprt() : x(5) {}
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107 suspend_always_intprt(int __x) : x(__x) {}
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108 ~suspend_always_intprt() {}
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109 bool await_ready() const noexcept { return false; }
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110 void await_suspend(coro::coroutine_handle<>) const noexcept { PRINT ("susp-always-susp-intprt");}
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111 int await_resume() const noexcept { PRINT ("susp-always-resume-intprt"); return x;}
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112 };
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113
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114 /* This returns the square of the int that it was constructed with. */
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115 struct suspend_always_longprtsq {
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116 long x;
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117 suspend_always_longprtsq() : x(12L) { PRINT ("suspend_always_longprtsq def ctor"); }
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118 suspend_always_longprtsq(long _x) : x(_x) { PRINTF ("suspend_always_longprtsq ctor with %ld\n", x); }
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119 ~suspend_always_longprtsq() {}
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120 bool await_ready() const noexcept { return false; }
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121 void await_suspend(coro::coroutine_handle<>) const noexcept { PRINT ("susp-always-susp-longsq");}
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122 long await_resume() const noexcept { PRINT ("susp-always-resume-longsq"); return x * x;}
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123 };
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124
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125 struct suspend_always_intrefprt {
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126 int& x;
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127 suspend_always_intrefprt(int& __x) : x(__x) {}
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128 ~suspend_always_intrefprt() {}
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129 bool await_ready() const noexcept { return false; }
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130 void await_suspend(coro::coroutine_handle<>) const noexcept { PRINT ("susp-always-susp-intprt");}
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131 int& await_resume() const noexcept { PRINT ("susp-always-resume-intprt"); return x;}
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132 };
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133
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134 template <typename _AwaitType>
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135 struct suspend_always_tmpl_awaiter {
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136 _AwaitType x;
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137 suspend_always_tmpl_awaiter(_AwaitType __x) : x(__x) {}
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138 ~suspend_always_tmpl_awaiter() {}
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139 bool await_ready() const noexcept { return false; }
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140 void await_suspend(coro::coroutine_handle<>) const noexcept { PRINT ("suspend_always_tmpl_awaiter");}
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141 _AwaitType await_resume() const noexcept { PRINT ("suspend_always_tmpl_awaiter"); return x;}
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142 };
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143
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144 };
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