0556412f8d
@kha The runtime folder includes what is needed to link a standalone Lean program. It is still contains some unnecessary files. We will be able to remove them after we release Lean4.
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
/*
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Copyright (c) 2018 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include <limits>
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#include "runtime/thread.h"
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#include "runtime/exception.h"
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#include "library/unique_id.h"
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namespace lean {
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static unsigned g_next_thread_id = 0;
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static mutex * g_next_thread_id_guard = nullptr;
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LEAN_THREAD_VALUE(unsigned, g_thread_id, std::numeric_limits<unsigned>::max());
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LEAN_THREAD_VALUE(unsigned, g_next_idx, 0);
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unique_id::unique_id():
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m_thread_id(std::numeric_limits<unsigned>::max()),
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m_id(0) {
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}
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bool unique_id::is_valid() const {
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return m_thread_id != std::numeric_limits<unsigned>::max();
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}
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unique_id mk_unique_id() {
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if (g_thread_id == std::numeric_limits<unsigned>::max()) {
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lock_guard<mutex> lock(*g_next_thread_id_guard);
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g_thread_id = g_next_thread_id;
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g_next_thread_id++;
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if (g_next_thread_id == std::numeric_limits<unsigned>::max()) {
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g_next_thread_id--;
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throw exception("failed to generate unique id, too many threads");
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}
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}
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unique_id r(g_thread_id, g_next_idx);
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g_next_idx++;
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if (g_next_idx == std::numeric_limits<unsigned>::max()) {
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g_next_idx--;
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throw exception("failed to generate unique unique id, too many ids have been generated");
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}
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return r;
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}
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void initialize_unique_id() {
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g_next_thread_id_guard = new mutex();
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register_thread_local_reset_fn([]() { g_next_idx = 0; });
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}
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void finalize_unique_id() {
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delete g_next_thread_id_guard;
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}
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}
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