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NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...运行一个有三个参数的程序时，它的工作原理:
./program foo bar 42 栈结构如下:
4
参数数目(argc),包含程序名称
program
程序名称(argv[0])
foo
参数1，第一个实际参数argv[1]
bar
参数2，argv[2]
...
Still Reachable Leak detected by Valgrind
...locations and not free'd are almost always leaks.
Here is an example
int foo(void)
{
static char *working_buf = NULL;
char *temp_buf;
if (!working_buf) {
working_buf = (char *) malloc(16 * 1024);
}
temp_buf = (char *) malloc(5 * 1024);
....
....
....
}
...
Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
...wnloading ruby-2.1.2.tar.gz...
-> http://dqw8nmjcqpjn7.cloudfront.net/f22a6447811a81f3c808d1c2a5ce3b5f5f0955c68c9a749182feb425589e6635
Installing ruby-2.1.2...
Installed ruby-2.1.2 to /Users/ryan/.rbenv/versions/2.1.2
sh...
How do I watch a file for changes?
... print "File %s modified" % (FNAME,)
signal.signal(signal.SIGIO, handler)
fd = os.open(FNAME, os.O_RDONLY)
fcntl.fcntl(fd, fcntl.F_SETSIG, 0)
fcntl.fcntl(fd, fcntl.F_NOTIFY,
fcntl.DN_MODIFY | fcntl.DN_CREATE | fcntl.DN_MULTISHOT)
while True:
time.sleep(10000)
...
Delete specific line number(s) from a text file using sed?
...
$ cat foo
1
2
3
4
5
$ sed -e '2d;4d' foo
1
3
5
$
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Generating v5 UUID. What is name and namespace?
...ith the 20-byte hash from SHA1:
SHA1 Digest: 74738ff5 5367 e958 9aee 98fffdcd1876 94028007
UUID (v5): 74738ff5-5367-5958-9aee-98fffdcd1876
^_low nibble is set to 5, to indicate type 5
^_first two bits set to 1 and 0, respectively
...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
... undecorated, but still adorned, version of the name. For a method named "foo", gcc will give you "foo", VC will give "my_namespace::my_class::foo".
– Adrian McCarthy
Jul 1 '15 at 15:56
...
What is the Difference Between read() and recv() , and Between send() and write()?
...ntly that when I used write() on a socket in Windows, it almost works (the FD passed to write() isn't the same as the one passed to send(); I used _open_osfhandle() to get the FD to pass to write()). However, it didn't work when I tried to send binary data that included character 10. write() somew...
How to read the content of a file to a string in C?
...actually share the physical memory.
POSIX code would look like this:
int fd = open("filename", O_RDONLY);
int len = lseek(fd, 0, SEEK_END);
void *data = mmap(0, len, PROT_READ, MAP_PRIVATE, fd, 0);
Windows on the other hand is little more tricky, and unfortunately I don't have a compiler in fron...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...定义的Service。点击进入这个Characteristic，看到它的UUID为2A06。然后我们到蓝牙官网定义的列表Characteristics搜索2A06，进入Characteristic的详情页面。
于是，该Characteristic操作定义非常明确了。点击“Write new value”，可以写入新的值...