TLS.cpp

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// checking for thread-local storage
 
 
#include <stdio.h>
 
#if defined (_MSC_VER)
#  define _RWSTD_THREAD __declspec (thread)
#else
#  define _RWSTD_THREAD __thread
#endif
 
#define STR(x) #x
#define PRINT_MACRO(name) printf ("#define " #name " " STR (name) "\n")
 
_RWSTD_THREAD int tls_i;
 
static _RWSTD_THREAD char tls_static_array [256];
extern _RWSTD_THREAD char tls_extern_array [256];
 
_RWSTD_THREAD char tls_extern_array [256];
 
int main ()
{
    int result = tls_i + tls_static_array [0] + tls_extern_array [0];
 
    if (0 == result)
        PRINT_MACRO (_RWSTD_THREAD);
 
    return result;
}