tbb: initial package 2021.6.0

packages/devel/tbb/package.mk

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (C) 2022-present Team LibreELEC (https://libreelec.tv)
+
+PKG_NAME="tbb"
+PKG_VERSION="2021.6.0"
+PKG_SHA256="4897dd106d573e9dacda8509ca5af1a0e008755bf9c383ef6777ac490223031f"
+PKG_LICENSE="Apache-2.0"
+PKG_SITE="https://github.com/oneapi-src/oneTBB"
+PKG_URL="https://github.com/oneapi-src/oneTBB/archive/refs/tags/v${PKG_VERSION}.tar.gz"
+PKG_DEPENDS_HOST="cmake:host ninja:host"
+PKG_LONGDESC="oneTBB is a flexible C++ library that simplifies the work of adding parallelism to complex applications"
+
+PKG_CMAKE_OPTS_HOST="-DTBB_TEST=OFF \
+                     -DTBB_EXAMPLES=OFF \
+                     -DTBB_STRICT=OFF \
+                     -DTBB4PY_BUILD=OFF \
+                     -DTBB_BUILD=ON \
+                     -DTBBMALLOC_BUILD=ON \
+                     -DTBBMALLOC_PROXY_BUILD=ON \
+                     -DTBB_CPF=OFF \
+                     -DTBB_FIND_PACKAGE=OFF \
+                     -DTBB_DISABLE_HWLOC_AUTOMATIC_SEARCH=OFF \
+                     -DTBB_ENABLE_IPO=ON"
+
+pre_configure_host() {
+  export CXXFLAGS+=" -D__TBB_DYNAMIC_LOAD_ENABLED=0"
+}

packages/devel/tbb/patches/tbb-999.01-PR824-retry-if-pthread_create-fails-with-EAGAIN.patch

@@ -0,0 +1,63 @@
+From f12c93efd04991bc982a27e2fa6142538c33ca82 Mon Sep 17 00:00:00 2001
+From: Rui Ueyama <ruiu@cs.stanford.edu>
+Date: Sat, 7 May 2022 19:55:24 +0800
+Subject: [PATCH] Retry if pthread_create fails with EAGAIN
+
+On many Unix-like systems, pthread_create can fail spuriously even if
+the running machine has enough resources to spawn a new thread.
+Therefore, if EAGAIN is returned from pthread_create, we actually have
+to try again.
+
+I observed this issue when running the mold linker
+(https://github.com/rui314/mold) under a heavy load. mold uses OneTBB
+for parallelization.
+
+As another data point, Go has the same logic to retry on EAGAIN:
+https://go-review.googlesource.com/c/go/+/33894/
+
+nanosleep is defined in POSIX 2001, so I believe that all Unix-like
+systems support it.
+
+Signed-off-by: Rui Ueyama <ruiu@cs.stanford.edu>
+---
+ src/tbb/rml_thread_monitor.h | 19 ++++++++++++++++++-
+ 1 file changed, 18 insertions(+), 1 deletion(-)
+
+diff --git a/src/tbb/rml_thread_monitor.h b/src/tbb/rml_thread_monitor.h
+index 13b556380..5b844b232 100644
+--- a/src/tbb/rml_thread_monitor.h
++++ b/src/tbb/rml_thread_monitor.h
+@@ -31,6 +31,7 @@
+ #include <pthread.h>
+ #include <cstring>
+ #include <cstdlib>
++#include <time.h>
+ #else
+ #error Unsupported platform
+ #endif
+@@ -191,8 +192,24 @@ inline thread_monitor::handle_type thread_monitor::launch( void* (*thread_routin
+     check(pthread_attr_init( &s ), "pthread_attr_init has failed");
+     if( stack_size>0 )
+         check(pthread_attr_setstacksize( &s, stack_size ), "pthread_attr_setstack_size has failed" );
++
+     pthread_t handle;
+-    check( pthread_create( &handle, &s, thread_routine, arg ), "pthread_create has failed" );
++    int tries = 0;
++    for (;;) {
++      int error_code = pthread_create(&handle, &s, thread_routine, arg);
++      if (!error_code)
++        break;
++      if (error_code != EAGAIN || tries++ > 20) {
++        handle_perror(error_code, "pthread_create has failed");
++        break;
++      }
++
++      // pthreaed_create can spuriously fail on many Unix-like systems.
++      // Retry after tries * 1 millisecond.
++      struct timespec ts = {0, tries * 1000 * 1000};
++      nanosleep(&ts, NULL);
++    }
++
+     check( pthread_attr_destroy( &s ), "pthread_attr_destroy has failed" );
+     return handle;
+ }