大约有 5,500 项符合查询结果(耗时:0.0163秒) [XML]
Is gettimeofday() guaranteed to be of microsecond resolution?
...of detail.
#include <stdio.h>
#include <stdint.h>
inline uint64_t rdtsc() {
uint32_t lo, hi;
__asm__ __volatile__ (
"xorl %%eax, %%eax\n"
"cpuid\n"
"rdtsc\n"
: "=a" (lo), "=d" (hi)
:
: "%ebx", "%ecx");
return (uint64_t)hi << 32 | lo...
When should I use the “strictfp” keyword in java?
...rDan Dyer
50.6k1616 gold badges124124 silver badges164164 bronze badges
29
...
What is the difference between char array and char pointer in C?
...
gsamaras
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answered Apr 17 '12 at 7:15
JonJon
...
Memory address of variables in Java
... that identity hash codes are not guaranteed to be unique. For instance on 64-bit JVM there are 2^32 identity hash codes but 2^64 memory addresses.
– Alex Jasmin
Dec 25 '09 at 14:42
...
Ruby max integer
...t to how big they can be.
If you are looking for the machine's size, i.e. 64- or 32-bit, I found this trick at ruby-forum.com:
machine_bytes = ['foo'].pack('p').size
machine_bits = machine_bytes * 8
machine_max_signed = 2**(machine_bits-1) - 1
machine_max_unsigned = 2**machine_bits - 1
If you ...
How to find the mysql data directory from command line in windows
...----+
| basedir | /usr/local/mysql-5.7.17-macos10.12-x86_64/ |
| character_sets_dir | /usr/local/mysql-5.7.17-macos10.12-x86_64/share/charsets/ |
| datadir | /usr/local/mysql/data/ |
| innodb_data_home_dir ...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...因为我基本上都是在Unix下使用make,以前在SCO Unix和IBM的AIX,现在在Linux、Solaris、HP-UX、AIX和Alpha下使用,Linux和Solaris下更多一点。不过,我可以肯定的是,在Unix下的make,无论是哪种平台,几乎都使用了Richard Stallman开发的make和cc/...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...因为我基本上都是在Unix下使用make,以前在SCO Unix和IBM的AIX,现在在Linux、Solaris、HP-UX、AIX和Alpha下使用,Linux和Solaris下更多一点。不过,我可以肯定的是,在Unix下的make,无论是哪种平台,几乎都使用了Richard Stallman开发的make和cc/...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...因为我基本上都是在Unix下使用make,以前在SCO Unix和IBM的AIX,现在在Linux、Solaris、HP-UX、AIX和Alpha下使用,Linux和Solaris下更多一点。不过,我可以肯定的是,在Unix下的make,无论是哪种平台,几乎都使用了Richard Stallman开发的make和cc/...
Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升
...因为我基本上都是在Unix下使用make,以前在SCO Unix和IBM的AIX,现在在Linux、Solaris、HP-UX、AIX和Alpha下使用,Linux和Solaris下更多一点。不过,我可以肯定的是,在Unix下的make,无论是哪种平台,几乎都使用了Richard Stallman开发的make和cc/...
