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iPhone Data Usage Tracking/Monitoring
...erence between two readings. This is because ifi_obytes and ifi_ibytes are uint_32 and their max value is 4294967295.
Also, I recommend using unsigned ints for the variables containing the data sent and received. Regular ints have half the max value of an unsigned integer, so when adding ifi_obytes...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
... OS X 10.8.5, I got the output:
#define __DBL_MIN_EXP__ (-1021)
#define __UINT_LEAST16_MAX__ 65535
#define __ATOMIC_ACQUIRE 2
#define __FLT_MIN__ 1.17549435082228750797e-38F
#define __UINT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## L
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#def...
Swift Beta performance: sorting arrays
...x_swift[i] = CInt(random())
x_c[i] = CInt(random())
}
let swift_start:UInt64 = mach_absolute_time();
quicksort_swift(&x_swift, 0, x_swift.count)
let swift_stop:UInt64 = mach_absolute_time();
let c_start:UInt64 = mach_absolute_time();
quicksort_c(&x_c, CInt(x_c.count))
let c_stop:UInt64...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...um;<br> //如果为1，则所有线程可以监听同一个地址
uint8_t reuseport : 1;
// 监听地址
easy_addr_t addr;
//各种回调函数的集合
easy_io_handler_pt *handler;
// 多个io线程竞争listen的锁
easy_atomi...
C99 stdint.h header and MS Visual Studio
... copy? Without this header I have no definitions for useful types such as uint32_t, etc.
7 Answers
...
How to measure time in milliseconds using ANSI C?
...m interested in measuring
clock_gettime(CLOCK_MONOTONIC, &end);
uint64_t timeElapsed = timespecDiff(&end, &start);
}
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printf format specifiers for uint32_t and size_t
...ning splint I get the following: 1) printf (%u) expects unsigned int gets uint32_t: i 2) printf (%u) expects unsigned int gets size_t: k
– ant2009
Jul 2 '10 at 18:45
...
Create a pointer to two-dimensional array
...
Here you wanna make a pointer to the first element of the array
uint8_t (*matrix_ptr)[20] = l_matrix;
With typedef, this looks cleaner
typedef uint8_t array_of_20_uint8_t[20];
array_of_20_uint8_t *matrix_ptr = l_matrix;
Then you can enjoy life again :)
matrix_ptr[0][1] = ...;
Bewa...
error: passing xxx as 'this' argument of xxx discards qualifiers
... me give a more detail example. As to the below struct:
struct Count{
uint32_t c;
Count(uint32_t i=0):c(i){}
uint32_t getCount(){
return c;
}
uint32_t add(const Count& count){
uint32_t total = c + count.getCount();
return total;
}
};
As you...
C++ convert hex string to signed integer
...> std::hex >> out.value;
return in;
}
};
Used like
uint32_t value = boost::lexical_cast<HexTo<uint32_t> >("0x2a");
That way you don't need one impl per int type.
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