sisema.cpp

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 64 行

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*                            Open Watcom Project
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// SISEMA.CPP -- static initialization semaphore for multi-threading
//
// 92/10/27  -- G.R.Bentz       -- defined
// 93/03/95  -- Greg Bentz      -- integrated with front end
// 95/06/14  -- Greg Bentz      -- dll linkage

#ifdef __MT__

#include <cpplib.h>
#include <new>

extern "C"
_WPRTLINK
int CPPLIB(static_init)(            // CHECK STATIC INIT ONCE ONLY BIT
    unsigned char *bits,            // - bit field to check
    int mask )                      // - mask we are interested in
{
    int retn = 1;

    if( (*bits & mask) == 0 ) {
        _RWD_StaticInitSema.p();
        if( (*bits & mask) == 0 ) {
            (*bits) |= (unsigned char)mask;
            retn = 0;
        }
        _RWD_StaticInitSema.v();
    }
    return( retn );
}

#endif