C/C++ static vs global statichas a very simple logic to it. If a variable isstatic, it means that it is a global variable, but it's scope is limited to where it is defined (i.e. only visible there). For example:
chara ='A';//global variablevoidmsg() { printf("Hello\n"); } 下面是 main.c 的内容: intmain(void) {externchara;//extern variable must be declared before useprintf("%c", a); (void)msg();return0; } 程序的运行结果是: A Hello 如果加了 static,就会对其它源文件隐藏。例如在 a 和 m...
intmain{ // you don't need to capture a global variable [] {returnx; }; } 但如果是局部变量,由于它的存储时期为 automatic,就必须捕获才能使用: intmain{ intx =42; // you have to capture a local variable [&x] {returnx; }; } 但如果使用 static 修饰该局部变量,就无需再进行捕获: int...
$display("block level ‘n’ = %0d",n); $unit::n = 4; //Static Global $display("Statically declared ‘n’ = %0d",$unit::n); end initial begin //hierarchical reference to local variable $display("init2.n = %0d", init2.n); end endmodule module next; //Static variable 'n'...
intx=42;intmain(){//youdon'tneed tocapturea globalvariable[]{returnx;}(); } 但如果是局部变量,由于它的存储时期为 automatic,就必须捕获才能使用: intmain(){intx=42;//youhavetocapturealocalvariable[&x]{returnx;}(); } 但如果使用 static 修饰该局部变量,就无需再进行捕获: ...
(); } extern "C" void __cdecl _Init_thread_footer(int* const pOnce) noexcept { _Init_thread_lock(); ++_Init_global_epoch; // 从 0x80000000 加 1 *pOnce = _Init_global_epoch; // 将 0x80000001 赋值给 pOnce _Init_thread_epoch = _Init_global_epoch; _Init_thread_unlock(); _...
*/ CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_ctors_aux) 这个宏将会展开,它将这个__do_global_ctors_aux放入.init节,然后由crti中的init遍历来完成。 init节如何遍历 这个实现位于C库中glibc-2.7\sysdeps\generic\initfini.c 这里的处理使用了脚本,这个文件同样将会生成两个文件,分别是...
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In the functionmyFunction()definition,varis not static, it’s alocal/automatic variablehere and it will be declared every time of program’s execution will move the function definition; that’s why on every calling ofmyFunction(), value ofvarwill be 1....