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kernel/qcore_unix.cpp

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41 -

42 #include "qcore_unix_p.h" -

43 #include "qelapsedtimer.h" -

44 -

45 #ifdef Q_OS_NACL -

46 #elif !defined (Q_OS_VXWORKS) -

47 # if !defined(Q_OS_HPUX) || defined(__ia64) -

48 # include <sys/select.h> -

49 # endif -

50 # include <sys/time.h> -

51 #else -

52 # include <selectLib.h> -

53 #endif -

54 -

55 #include <stdlib.h> -

56 -

57 #ifdef Q_OS_MAC -

58 #include <mach/mach_time.h> -

59 #endif -

60 -

61 QT_BEGIN_NAMESPACE -

62 -

63 static inline bool time_update(struct timeval *tv, const struct timeval &start, -

64 const struct timeval &timeout) -

65 { -

if (!QElapsedTimer::isMonotonic()) {

partially evaluated: !QElapsedTimer::isMonotonic()

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:180

0-180

67 // we cannot recalculate the timeout without a monotonic clock as the time may have changed -

return false;

never executed: return false;

69 } -

70 -

71 // clock source is monotonic, so we can recalculate how much timeout is left -

struct timeval now = qt_gettime();

executed (the execution status of this line is deduced): struct timeval now = qt_gettime();

*tv = timeout + start - now;

executed (the execution status of this line is deduced): *tv = timeout + start - now;

return tv->tv_sec >= 0;

executed: return tv->tv_sec >= 0;

Execution Count:180

180

75 } -

76 -

77 int qt_safe_select(int nfds, fd_set *fdread, fd_set *fdwrite, fd_set *fdexcept, -

78 const struct timeval *orig_timeout) -

79 { -

if (!orig_timeout) {

evaluated: !orig_timeout

TRUE	FALSE
yes Evaluation Count:11214	yes Evaluation Count:60939

11214-60939

81 // no timeout -> block forever -

executed (the execution status of this line is deduced): register int ret;

EINTR_LOOP(ret, select(nfds, fdread, fdwrite, fdexcept, 0));

executed: }

Execution Count:11217

evaluated: ret == -1

TRUE	FALSE
yes Evaluation Count:3	yes Evaluation Count:11214

partially evaluated: (*__errno_location ()) == 4

TRUE	FALSE
yes Evaluation Count:3	no Evaluation Count:0

0-11217

return ret;

executed: return ret;

Execution Count:11214

11214

85 } -

86 -

timeval start = qt_gettime();

executed (the execution status of this line is deduced): timeval start = qt_gettime();

timeval timeout = *orig_timeout;

executed (the execution status of this line is deduced): timeval timeout = *orig_timeout;

89 -

90 // loop and recalculate the timeout as needed -

int ret;

executed (the execution status of this line is deduced): int ret;

forever {

executed (the execution status of this line is deduced): for(;;) {

ret = ::select(nfds, fdread, fdwrite, fdexcept, &timeout);

executed (the execution status of this line is deduced): ret = ::select(nfds, fdread, fdwrite, fdexcept, &timeout);

if (ret != -1 || errno != EINTR)

evaluated: ret != -1

TRUE	FALSE
yes Evaluation Count:60942	yes Evaluation Count:180

partially evaluated: (*__errno_location ()) != 4

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:180

0-60942

return ret;

executed: return ret;

Execution Count:60942

60942

96 -

97 // recalculate the timeout -

if (!time_update(&timeout, start, *orig_timeout)) {

partially evaluated: !time_update(&timeout, start, *orig_timeout)

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:180

0-180

99 // timeout during update -

100 // or clock reset, fake timeout error -

101

return 0;

never executed: return 0;

102 } -

103

}

executed: }

Execution Count:180

180

104

}

never executed: }

105 -

106 QT_END_NAMESPACE -

107 -

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