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60 lines
2.4 KiB
C++
60 lines
2.4 KiB
C++
//===-- llvm/Support/Threading.h - Control multithreading mode --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// TThis file defines llvm_start_multithreaded() and friends.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_THREADING_H
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#define LLVM_SUPPORT_THREADING_H
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namespace llvm {
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/// llvm_start_multithreaded - Allocate and initialize structures needed to
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/// make LLVM safe for multithreading. The return value indicates whether
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/// multithreaded initialization succeeded. LLVM will still be operational
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/// on "failed" return, and will still be safe for hosting threading
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/// applications in the JIT, but will not be safe for concurrent calls to the
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/// LLVM APIs.
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/// THIS MUST EXECUTE IN ISOLATION FROM ALL OTHER LLVM API CALLS.
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bool llvm_start_multithreaded();
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/// llvm_stop_multithreaded - Deallocate structures necessary to make LLVM
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/// safe for multithreading.
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/// THIS MUST EXECUTE IN ISOLATION FROM ALL OTHER LLVM API CALLS.
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void llvm_stop_multithreaded();
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/// llvm_is_multithreaded - Check whether LLVM is executing in thread-safe
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/// mode or not.
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bool llvm_is_multithreaded();
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/// acquire_global_lock - Acquire the global lock. This is a no-op if called
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/// before llvm_start_multithreaded().
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void llvm_acquire_global_lock();
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/// release_global_lock - Release the global lock. This is a no-op if called
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/// before llvm_start_multithreaded().
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void llvm_release_global_lock();
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/// llvm_execute_on_thread - Execute the given \p UserFn on a separate
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/// thread, passing it the provided \p UserData.
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///
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/// This function does not guarantee that the code will actually be executed
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/// on a separate thread or honoring the requested stack size, but tries to do
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/// so where system support is available.
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///
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/// \param UserFn - The callback to execute.
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/// \param UserData - An argument to pass to the callback function.
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/// \param RequestedStackSize - If non-zero, a requested size (in bytes) for
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/// the thread stack.
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void llvm_execute_on_thread(void (*UserFn)(void*), void *UserData,
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unsigned RequestedStackSize = 0);
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}
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#endif
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