![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to x86lock.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [MW Coherent from dump] / coherent / b / STREAMS / conf / streams / src|
Return to x86lock.c CVS log | Up to [MW Coherent from dump] / coherent / b / STREAMS / conf / streams / src |
1.1 root 1: #define _DDI_DKI 1
2: #define _SYSV4 1
3:
4: /*
5: * Some simple tests to make sure that whatever is defined in the internal
6: * <sys/x86lock.h> header at least does vaguely what it should, even if it
7: * doesn't do it really atomically.
8: */
9:
10: #include <kernel/x86lock.h>
11: #include <limits.h>
12:
13:
14: #if __BORLANDC__
15:
16: /*
17: * The following functions cannot safely be used in-line in Borland C++
18: * due to problems with 32-bit code generation and register pseudovariables.
19: */
20:
21: #if defined (__HUGE__) || defined (__COMPACT__) || defined (__LARGE__)
22:
23: void * ATOMIC_FETCH_AND_STORE_PTR (__atomic_ptr_t lock, void * value) {
24: long temp;
25: temp = ATOMIC_FETCH_AND_STORE_LONG (lock, (long) value);
26: return (void *) temp;
27: }
28:
29: #if 0
30: void * ATOMIC_FETCH_PTR (__atomic_ptr_t lock) {
31: return (void *) ATOMIC_FETCH_LONG (lock);
32: }
33: #endif
34:
35: #endif /* large data model */
36:
37: #endif /* __BORLANDC__ */
38:
39: #ifndef __LOCAL__
40: #error
41: #endif
42:
43: /*
44: * Here we exercise the atomic operations. Note that these tests have revealed
45: * many important subtleties of the way the operations and the compilers work
46: * during the development of the <sys/x86lock.h> header; in particular, the
47: * tests below reveal some important things about the use of the "volatile"
48: * keyword in highly optimizing compilers like GCC, where the compiler was
49: * able to statically (and incorrectly) predict what the result "ought" to
50: * have been.
51: *
52: * Having said that, in systems which are capable of in-line code generation
53: * it also pays to ensure that operations are not being *totally* elided due
54: * to overzealous optimization. This can really only be done by manual
55: * examination of the form of the generated code.
56: */
57:
58: __LOCAL__ atomic_char_t achar;
59: __LOCAL__ atomic_uchar_t auchar;
60: __LOCAL__ atomic_short_t ashort;
61: __LOCAL__ atomic_ushort_t aushort;
62: __LOCAL__ atomic_int_t aint;
63: __LOCAL__ atomic_uint_t auint;
64: __LOCAL__ atomic_long_t along;
65: __LOCAL__ atomic_ulong_t aulong;
66: __LOCAL__ atomic_ptr_t aptr;
67:
68: __EXTERN_C__
69: #if __USE_PROTO__
70: int (testX86) (void)
71: #else
72: int
73: testX86 __ARGS (())
74: #endif
75: {
76: char achartemp = '1';
77: uchar_t auchartemp = 'y';
78: short ashorttemp = -2438;
79: ushort_t aushorttemp = 12034;
80: int ainttemp = -12438;
81: uint_t auinttemp = 21349;
82: long alongtemp = -1385866L;
83: ulong_t aulongtemp = 124875656L;
84: _VOID * aptrtemp = & achartemp;
85:
86: /*
87: * Set some sensible initial values.
88: */
89:
90: (void) ATOMIC_FETCH_AND_STORE_CHAR (achar, achartemp);
91: (void) ATOMIC_FETCH_AND_STORE_UCHAR (auchar, auchartemp);
92: (void) ATOMIC_FETCH_AND_STORE_SHORT (ashort, ashorttemp);
93: (void) ATOMIC_FETCH_AND_STORE_USHORT (aushort, aushorttemp);
94: (void) ATOMIC_FETCH_AND_STORE_INT (aint, ainttemp);
95: (void) ATOMIC_FETCH_AND_STORE_UINT (auint, auinttemp);
96: (void) ATOMIC_FETCH_AND_STORE_LONG (along, alongtemp);
97: (void) ATOMIC_FETCH_AND_STORE_ULONG (aulong, aulongtemp);
98: (void) ATOMIC_FETCH_AND_STORE_PTR (aptr, aptrtemp);
99:
100:
101: if (ATOMIC_FETCH_CHAR (achar) != achartemp ||
102: ATOMIC_FETCH_UCHAR (auchar) != auchartemp ||
103: ATOMIC_FETCH_SHORT (ashort) != ashorttemp ||
104: ATOMIC_FETCH_USHORT (aushort) != aushorttemp ||
105: ATOMIC_FETCH_INT (aint) != ainttemp ||
106: ATOMIC_FETCH_UINT (auint) != auinttemp ||
107: ATOMIC_FETCH_LONG (along) != alongtemp ||
108: ATOMIC_FETCH_ULONG (aulong) != aulongtemp ||
109: ATOMIC_FETCH_PTR (aptr) != aptrtemp ||
110:
111: ATOMIC_FETCH_AND_STORE_CHAR (achar, SCHAR_MAX) != achartemp ||
112: ATOMIC_FETCH_AND_STORE_UCHAR (auchar, UCHAR_MAX) != auchartemp ||
113: ATOMIC_FETCH_AND_STORE_SHORT (ashort, SHRT_MAX) != ashorttemp ||
114: ATOMIC_FETCH_AND_STORE_USHORT (aushort, USHRT_MAX) != aushorttemp ||
115: ATOMIC_FETCH_AND_STORE_INT (aint, INT_MAX) != ainttemp ||
116: ATOMIC_FETCH_AND_STORE_UINT (auint, UINT_MAX) != auinttemp ||
117: ATOMIC_FETCH_AND_STORE_LONG (along, LONG_MAX) != alongtemp ||
118: ATOMIC_FETCH_AND_STORE_ULONG (aulong, ULONG_MAX) != aulongtemp ||
119: ATOMIC_FETCH_AND_STORE_PTR (aptr, & aulongtemp) != aptrtemp ||
120:
121: ATOMIC_FETCH_CHAR (achar) != SCHAR_MAX ||
122: ATOMIC_FETCH_UCHAR (auchar) != UCHAR_MAX ||
123: ATOMIC_FETCH_SHORT (ashort) != SHRT_MAX ||
124: ATOMIC_FETCH_USHORT (aushort) != USHRT_MAX ||
125: ATOMIC_FETCH_INT (aint) != INT_MAX ||
126: ATOMIC_FETCH_UINT (auint) != UINT_MAX ||
127: ATOMIC_FETCH_LONG (along) != LONG_MAX ||
128: ATOMIC_FETCH_ULONG (aulong) != ULONG_MAX ||
129: ATOMIC_FETCH_PTR (aptr) != & aulongtemp ||
130:
131: ATOMIC_FETCH_AND_STORE_CHAR (achar, SCHAR_MIN) != SCHAR_MAX ||
132: ATOMIC_FETCH_AND_STORE_UCHAR (auchar, 0) != UCHAR_MAX ||
133: ATOMIC_FETCH_AND_STORE_SHORT (ashort, SHRT_MIN) != SHRT_MAX ||
134: ATOMIC_FETCH_AND_STORE_USHORT (aushort, 0) != USHRT_MAX ||
135: ATOMIC_FETCH_AND_STORE_INT (aint, INT_MIN) != INT_MAX ||
136: ATOMIC_FETCH_AND_STORE_UINT (auint, 0) != UINT_MAX ||
137: ATOMIC_FETCH_AND_STORE_LONG (along, LONG_MIN) != LONG_MAX ||
138: ATOMIC_FETCH_AND_STORE_ULONG (aulong, 0) != ULONG_MAX ||
139: ATOMIC_FETCH_AND_STORE_PTR (aptr, 0) != & aulongtemp ||
140:
141: ATOMIC_FETCH_CHAR (achar) != SCHAR_MIN ||
142: ATOMIC_FETCH_UCHAR (auchar) != 0 ||
143: ATOMIC_FETCH_SHORT (ashort) != SHRT_MIN ||
144: ATOMIC_FETCH_USHORT (aushort) != 0 ||
145: ATOMIC_FETCH_INT (aint) != INT_MIN ||
146: ATOMIC_FETCH_UINT (auint) != 0 ||
147: ATOMIC_FETCH_LONG (along) != LONG_MIN ||
148: ATOMIC_FETCH_ULONG (aulong) != 0 ||
149: ATOMIC_FETCH_PTR (aptr) != 0 ||
150:
151: ATOMIC_FETCH_AND_STORE_CHAR (achar, 0) != SCHAR_MIN ||
152: ATOMIC_FETCH_AND_STORE_UCHAR (auchar, 0) != 0 ||
153: ATOMIC_FETCH_AND_STORE_SHORT (ashort, 0) != SHRT_MIN ||
154: ATOMIC_FETCH_AND_STORE_USHORT (aushort, 0) != 0 ||
155: ATOMIC_FETCH_AND_STORE_INT (aint, 0) != INT_MIN ||
156: ATOMIC_FETCH_AND_STORE_UINT (auint, 0) != 0 ||
157: ATOMIC_FETCH_AND_STORE_LONG (along, 0) != LONG_MIN ||
158: ATOMIC_FETCH_AND_STORE_ULONG (aulong, 0) != 0 ||
159: ATOMIC_FETCH_AND_STORE_PTR (aptr, 0) != 0 ||
160:
161: ATOMIC_TEST_AND_SET_UCHAR (auchar) != 0 ||
162: ATOMIC_FETCH_UCHAR (auchar) != (uchar_t) -1 ||
163: ATOMIC_TEST_AND_SET_UCHAR (auchar) != (uchar_t) -1 ||
164: (ATOMIC_CLEAR_UCHAR (auchar),
165: ATOMIC_FETCH_UCHAR (auchar)) != 0)
166:
167: return -1;
168:
169: return 0;
170: }
171:
172:
173: #ifdef TEST
174: #include <stdio.h>
175:
176: int main (void) {
177: printf (testX86 () ? "failed\n" : "passed\n");
178: return 0;
179: }
180: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.