tag | 55559df4582d09b7e37a12a3ecd9cffb8f7679ee | |
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tagger | The Android Open Source Project <initial-contribution@android.com> | Wed Apr 24 20:12:32 2024 -0700 |
object | a65c860170b50bc6f8442c58e6a9ea9e6328a872 |
aml_cbr_341610000 (11387106,com.google.android.cellbroadcast)
commit | a65c860170b50bc6f8442c58e6a9ea9e6328a872 | [log] [tgz] |
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author | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Fri Jul 07 01:01:27 2023 +0000 |
committer | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Fri Jul 07 01:01:27 2023 +0000 |
tree | 133c7c54d940a2d0a09df511d71608a9a6cf0391 | |
parent | 0cea17627ab3d24dc1fdaf11ab82fa45a79c8faa [diff] | |
parent | 99ba05775fae7b9f7c16d54ea8a2b24b75595cfe [diff] |
Snap for 10447354 from 99ba05775fae7b9f7c16d54ea8a2b24b75595cfe to mainline-cellbroadcast-release Change-Id: Ia06de9dbd79444ad760f85a6ac51829ca954b5ec
pthreadpool is a portable and efficient thread pool implementation. It provides similar functionality to #pragma omp parallel for
, but with additional features.
The following example demonstates using the thread pool for parallel addition of two arrays:
static void add_arrays(struct array_addition_context* context, size_t i) { context->sum[i] = context->augend[i] + context->addend[i]; } #define ARRAY_SIZE 4 int main() { double augend[ARRAY_SIZE] = { 1.0, 2.0, 4.0, -5.0 }; double addend[ARRAY_SIZE] = { 0.25, -1.75, 0.0, 0.5 }; double sum[ARRAY_SIZE]; pthreadpool_t threadpool = pthreadpool_create(0); assert(threadpool != NULL); const size_t threads_count = pthreadpool_get_threads_count(threadpool); printf("Created thread pool with %zu threads\n", threads_count); struct array_addition_context context = { augend, addend, sum }; pthreadpool_parallelize_1d(threadpool, (pthreadpool_task_1d_t) add_arrays, (void*) &context, ARRAY_SIZE, PTHREADPOOL_FLAG_DISABLE_DENORMALS /* flags */); pthreadpool_destroy(threadpool); threadpool = NULL; printf("%8s\t%.2lf\t%.2lf\t%.2lf\t%.2lf\n", "Augend", augend[0], augend[1], augend[2], augend[3]); printf("%8s\t%.2lf\t%.2lf\t%.2lf\t%.2lf\n", "Addend", addend[0], addend[1], addend[2], addend[3]); printf("%8s\t%.2lf\t%.2lf\t%.2lf\t%.2lf\n", "Sum", sum[0], sum[1], sum[2], sum[3]); return 0; }