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comparison test/callback_plain_c++/test_main.cc @ 545:ca28e9e3c644

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- test/callback_plain_c++, to test C++ non-trivial aggrs by value, as well as method callback handlers - Changelog
author Tassilo Philipp
date Tue, 31 May 2022 18:35:06 +0200
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children 214c4efc104f
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544:111236b31c75 545:ca28e9e3c644
1 /*
2
3 Package: dyncall
4 Library: test
5 File: test/callback_plain_c++/test_main.c
6 Description:
7
8 Tests only C++ specifics:
9 - method callback handlers (= standard dyncallback handler, but testing
10 calling convention mode setting and hidden this ptr)
11 - calling functions or methods that take/return non-trivial C++ aggregates
12
13 License:
14
15 Copyright (c) 2022 Tassilo Philipp <tphilipp@potion-studios.com>
16
17 Permission to use, copy, modify, and distribute this software for any
18 purpose with or without fee is hereby granted, provided that the above
19 copyright notice and this permission notice appear in all copies.
20
21 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
22 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
23 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
24 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
25 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
26 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
27 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
28
29 */
30
31 #include "../../dyncallback/dyncall_callback.h"
32 #include "../common/platformInit.h"
33 #include "../common/platformInit.c" /* Impl. for functions only used in this translation unit */
34
35
36 #if defined(DC__Feature_AggrByVal)
37 struct Triv {
38 float t;
39 };
40
41 struct NonTriv {
42 int i, j;
43 NonTriv(int a, int b) : i(a),j(b) { }
44 NonTriv(const NonTriv& rhs) { static int a=13, b=37; i = a++; j = b++; }
45 };
46
47
48 char cbNonTrivAggrArgHandler(DCCallback* cb, DCArgs* args, DCValue* result, void* userdata)
49 {
50 int* ud = (int*)userdata;
51 int arg1;
52 NonTriv arg2(0, 0);
53 NonTriv arg3(0, 0);
54 Triv arg4;
55 double arg5;
56
57 printf("reached callback\n");
58 printf("userdata: %d\n", *ud);
59
60 // the non-triv arg4 test basically assures that the aggr description list is
61 // respected (with first two being NULL as non-trivial aggrs)
62 arg1 = dcbArgInt(args); printf("1st argument: %d\n", arg1);
63 arg2 = *(NonTriv*)dcbArgAggr(args, NULL); printf("2nd argument: %d %d\n", arg2.i, arg2.j);
64 arg3 = *(NonTriv*)dcbArgAggr(args, NULL); printf("3nd argument: %d %d\n", arg3.i, arg3.j);
65 dcbArgAggr(args, (DCpointer)&arg4); printf("4th argument: %f\n", arg4.t);
66 arg5 = dcbArgDouble(args); printf("5th argument: %f\n", arg5);
67
68 // the non-triv aggregate members are 14, 38 and 15, 39, respectively, b/c of
69 // copy-ctor call on *passing* them to this handler (not b/c of assignment
70 // operator, above); see below on where 13 and 37 are initialized
71 result->d = *ud + arg1 + arg2.i + arg2.j + arg3.i + arg3.j + arg4.t + arg5;
72 return 'd';
73 }
74
75
76 int testNonTrivAggrArgsCallback()
77 {
78 DCCallback* cb;
79 Triv t = { 1.75f };
80 NonTriv a(1, 2);
81 NonTriv b(a); // this sets NonTriv's statics a = 13 and b = 37
82
83 int ret = 1;
84 double result = 0;
85 int userdata = 1337;
86
87 DCaggr *triv_aggr = dcNewAggr(1, sizeof(t));
88 dcAggrField(triv_aggr, DC_SIGCHAR_FLOAT, offsetof(Triv, t), 1);
89 dcCloseAggr(triv_aggr);
90
91 DCaggr *aggrs[3] = { NULL, NULL, triv_aggr }; // NULL b/c non-trivial aggrs, see manpage
92
93 cb = dcbNewCallback2("iAAAd)d", &cbNonTrivAggrArgHandler, &userdata, aggrs);
94
95 result = ((double(*)(int, NonTriv, NonTriv, Triv, double))cb)(123, a, b, t, 4.5);
96 dcbFreeCallback(cb);
97
98 printf("successfully returned from callback\n");
99 printf("return value (should be 1572.25): %f\n", result);
100
101 ret = result == 1572.25 && ret;
102
103 return ret;
104 }
105
106
107
108 char cbNonTrivAggrReturnHandler(DCCallback* cb, DCArgs* args, DCValue* result, void* userdata)
109 {
110 printf("reached callback\n");
111 dcbReturnAggr(args, result, NULL); // this sets result->p to the non-triv aggr space allocated by the calling convention
112 *(NonTriv*)result->p = NonTriv(1, 3); // explicit non-copy ctor and assignment operator, so not using NonTriv's statics a and b
113
114 return 'A';
115 }
116
117
118 int testNonTrivAggrReturnCallback()
119 {
120 int ret = 1;
121
122 {
123 DCCallback* cb;
124 DCaggr *aggrs[1] = { NULL }; // one non-triv aggr
125 cb = dcbNewCallback2(")A", &cbNonTrivAggrReturnHandler, NULL, aggrs);
126
127 NonTriv result = ((NonTriv(*)())cb)();
128
129 dcbFreeCallback(cb);
130
131 printf("successfully returned from callback\n");
132 printf("return value (should be %d %d): %d %d\n", 1, 3, result.i, result.j);
133
134 ret = result.i == 1 && result.j == 3 && ret;
135 }
136
137 return ret;
138 }
139 #endif
140
141
142 int main()
143 {
144 int result = 1;
145
146 dcTest_initPlatform();
147
148 #if defined(DC__Feature_AggrByVal)
149 result = testNonTrivAggrArgsCallback() && result;
150 result = testNonTrivAggrReturnCallback() && result;
151 #endif
152
153 printf("result: callback_plain_c++: %d\n", result);
154
155 dcTest_deInitPlatform();
156
157 return !result;
158 }
159