Qt 4.8
qfunctions_vxworks.cpp
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41 
42 #include "qglobal.h"
43 
44 #ifdef Q_OS_VXWORKS
45 
46 #include "qplatformdefs.h"
47 #include "qfunctions_vxworks.h"
48 
49 #if defined(_WRS_KERNEL)
50 #include <vmLib.h>
51 #endif
52 #include <selectLib.h>
53 #include <ioLib.h>
54 
56 
57 #ifdef __cplusplus
58 extern "C" {
59 #endif
60 
61 // no lfind() - used by the TIF image format
62 void *lfind(const void* key, const void* base, size_t* elements, size_t size,
63  int (*compare)(const void*, const void*))
64 {
65  const char* current = (char*) base;
66  const char* const end = (char*) (current + (*elements) * size);
67  while (current != end) {
68  if (compare(current, key) == 0)
69  return (void*)current;
70  current += size;
71  }
72  return 0;
73 }
74 
75 
76 // no rand_r(), but rand()
77 // NOTE: this implementation is wrong for multi threaded applications,
78 // but there is no way to get it right on VxWorks (in kernel mode)
79 int rand_r(unsigned int * /*seedp*/)
80 {
81  return rand();
82 }
83 
84 // no usleep() support
85 int usleep(unsigned int usec)
86 {
87  div_t dt = div(usec, 1000000);
88  struct timespec ts = { dt.quot, dt.rem * 1000 };
89 
90  return nanosleep(&ts, 0);
91 }
92 
93 
94 // gettimeofday() is declared, but is missing from the library
95 // It IS however defined in the Curtis-Wright X11 libraries, so
96 // we have to make the symbol 'weak'
97 #if defined(Q_CC_DIAB) && !defined(VXWORKS_DKM) && !defined(VXWORKS_RTP)
98 # pragma weak gettimeofday
99 #endif
100 int gettimeofday(struct timeval *tv, void /*struct timezone*/ *)
101 {
102  // the compiler will optimize this and will only use one code path
103  if (sizeof(struct timeval) == sizeof(struct timespec)) {
104  int res = clock_gettime(CLOCK_REALTIME, (struct timespec *) tv);
105  if (!res)
106  tv->tv_usec /= 1000;
107  return res;
108  } else {
109  struct timespec ts;
110 
111  int res = clock_gettime(CLOCK_REALTIME, &ts);
112  if (!res) {
113  tv->tv_sec = ts.tv_sec;
114  tv->tv_usec = ts.tv_nsec / 1000;
115  }
116  return res;
117  }
118 }
119 
120 // neither getpagesize() or sysconf(_SC_PAGESIZE) are available
121 int getpagesize()
122 {
123 #if defined(_WRS_KERNEL)
124  return vmPageSizeGet();
125 #else
126  return sysconf(_SC_PAGESIZE);
127 #endif
128 }
129 
130 // symlinks are not supported (lstat is now just a call to stat - see qplatformdefs.h)
131 int symlink(const char *, const char *)
132 {
133  errno = EIO;
134  return -1;
135 }
136 
137 ssize_t readlink(const char *, char *, size_t)
138 {
139  errno = EIO;
140  return -1;
141 }
142 
143 // there's no truncate(), but ftruncate() support...
144 int truncate(const char *path, off_t length)
145 {
146  int fd = open(path, O_WRONLY, 00777);
147  if (fd >= 0) {
148  int res = ftruncate(fd, length);
149  int en = errno;
150  close(fd);
151  errno = en;
152  return res;
153  }
154  // errno is already set by open
155  return -1;
156 }
157 
158 
159 
160 // VxWorks doesn't know about passwd & friends.
161 // in order to avoid patching the unix fs path everywhere
162 // we introduce some dummy functions that simulate a single
163 // 'root' user on the system.
164 
165 uid_t getuid()
166 {
167  return 0;
168 }
169 
170 gid_t getgid()
171 {
172  return 0;
173 }
174 
175 uid_t geteuid()
176 {
177  return 0;
178 }
179 
180 struct passwd *getpwuid(uid_t uid)
181 {
182  static struct passwd pwbuf = { "root", 0, 0, 0, 0, 0, 0 };
183 
184  if (uid == 0) {
185  return &pwbuf;
186  } else {
187  errno = ENOENT;
188  return 0;
189  }
190 }
191 
192 struct group *getgrgid(gid_t gid)
193 {
194  static struct group grbuf = { "root", 0, 0, 0 };
195 
196  if (gid == 0) {
197  return &grbuf;
198  } else {
199  errno = ENOENT;
200  return 0;
201  }
202 }
203 
204 #ifdef __cplusplus
205 } // extern "C"
206 #endif
207 
208 #endif // Q_OS_VXWORKS
static const uint base
Definition: qurl.cpp:268
static bool compare(const QVariant::Private *a, const QVariant::Private *b)
Compares a to b.
Definition: qvariant.cpp:383
int key
#define QT_USE_NAMESPACE
This macro expands to using QT_NAMESPACE if QT_NAMESPACE is defined and nothing otherwise.
Definition: qglobal.h:88
static const QTextHtmlElement elements[Html_NumElements]
static const KeyPair *const end
#define O_WRONLY
int open(const char *, int,...)
int errno