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Diffstat (limited to 'include/llvm/Support/Threading.h')
-rw-r--r-- | include/llvm/Support/Threading.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/llvm/Support/Threading.h b/include/llvm/Support/Threading.h index 03963a24c107e..6d813bccb93fc 100644 --- a/include/llvm/Support/Threading.h +++ b/include/llvm/Support/Threading.h @@ -131,6 +131,14 @@ void llvm_execute_on_thread(void (*UserFn)(void *), void *UserData, /// Returns 1 when LLVM is configured with LLVM_ENABLE_THREADS=OFF unsigned heavyweight_hardware_concurrency(); + /// Get the number of threads that the current program can execute + /// concurrently. On some systems std::thread::hardware_concurrency() returns + /// the total number of cores, without taking affinity into consideration. + /// Returns 1 when LLVM is configured with LLVM_ENABLE_THREADS=OFF. + /// Fallback to std::thread::hardware_concurrency() if sched_getaffinity is + /// not available. + unsigned hardware_concurrency(); + /// \brief Return the current thread id, as used in various OS system calls. /// Note that not all platforms guarantee that the value returned will be /// unique across the entire system, so portable code should not assume |