57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
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* Copyright (c) 2018 Martin Storsjo
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*
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* This file is part of llvm-mingw.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <windows.h>
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#include <stdio.h>
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#include <process.h>
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#include <stdint.h>
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#if defined(_MSC_VER)
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static __declspec(thread) int tlsvar = 1;
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#else
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static __thread int tlsvar = 1;
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#endif
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static unsigned __stdcall threadfunc(void* arg) {
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int id = (int)(intptr_t)arg;
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printf("thread %d, tlsvar %p initially %d\n", id, &tlsvar, tlsvar);
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tlsvar = id + 100;
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for (int i = 0; i < 4; i++) {
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printf("thread %d, tlsvar %p %d\n", id, &tlsvar, tlsvar);
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tlsvar += 10;
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Sleep(500);
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}
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return 0;
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}
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int main(int argc, char* argv[]) {
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HANDLE threads[3];
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for (int i = 0; i < 3; i++) {
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printf("mainthread, tlsvar %p %d\n", &tlsvar, tlsvar);
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tlsvar += 10;
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threads[i] = (HANDLE)_beginthreadex(NULL, 0, threadfunc, (void*)(intptr_t) (i + 1), 0, NULL);
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Sleep(350);
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}
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for (int i = 0; i < 3; i++) {
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WaitForSingleObject(threads[i], INFINITE);
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CloseHandle(threads[i]);
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}
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return 0;
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}
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