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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "../sys/array.h"
#include "../math/emath.h"
#include "../math/range.h"
// We need to define these to avoid implicit linkage against
// tbb_debug.lib under Windows. When removing these lines debug build
// under Windows fails.
#define __TBB_NO_IMPLICIT_LINKAGE 1
#define __TBBMALLOC_NO_IMPLICIT_LINKAGE 1
#define TBB_SUPPRESS_DEPRECATED_MESSAGES 1
#define TBB_PREVIEW_ISOLATED_TASK_GROUP 1
#include "tbb/tbb.h"
namespace embree
{
struct TaskScheduler
{
/* returns the total number of threads */
static __forceinline size_t threadCount() {
#if TBB_INTERFACE_VERSION >= 9100
return tbb::this_task_arena::max_concurrency();
#else
return tbb::task_scheduler_init::default_num_threads();
#endif
}
};
/* parallel_for without range */
template<typename Index, typename Func>
__forceinline void parallel_for( const Index N, const Func& func)
{
#if TBB_INTERFACE_VERSION >= 12002
tbb::task_group_context context;
tbb::parallel_for(Index(0),N,Index(1),[&](Index i) {
func(i);
},context);
if (context.is_group_execution_cancelled())
throw std::runtime_error("task cancelled");
#else
tbb::parallel_for(Index(0),N,Index(1),[&](Index i) {
func(i);
});
if (tbb::task::self().is_cancelled())
throw std::runtime_error("task cancelled");
#endif
}
/* parallel for with range and granulatity */
template<typename Index, typename Func>
__forceinline void parallel_for( const Index first, const Index last, const Index minStepSize, const Func& func)
{
assert(first <= last);
#if TBB_INTERFACE_VERSION >= 12002
tbb::task_group_context context;
tbb::parallel_for(tbb::blocked_range<Index>(first,last,minStepSize),[&](const tbb::blocked_range<Index>& r) {
func(range<Index>(r.begin(),r.end()));
},context);
if (context.is_group_execution_cancelled())
throw std::runtime_error("task cancelled");
#else
tbb::parallel_for(tbb::blocked_range<Index>(first,last,minStepSize),[&](const tbb::blocked_range<Index>& r) {
func(range<Index>(r.begin(),r.end()));
});
if (tbb::task::self().is_cancelled())
throw std::runtime_error("task cancelled");
#endif
}
/* parallel for with range */
template<typename Index, typename Func>
__forceinline void parallel_for( const Index first, const Index last, const Func& func)
{
assert(first <= last);
parallel_for(first,last,(Index)1,func);
}
#if (TBB_INTERFACE_VERSION > 4001)
template<typename Index, typename Func>
__forceinline void parallel_for_static( const Index N, const Func& func)
{
#if TBB_INTERFACE_VERSION >= 12002
tbb::task_group_context context;
tbb::parallel_for(Index(0),N,Index(1),[&](Index i) {
func(i);
},tbb::simple_partitioner(),context);
if (context.is_group_execution_cancelled())
throw std::runtime_error("task cancelled");
#else
tbb::parallel_for(Index(0),N,Index(1),[&](Index i) {
func(i);
},tbb::simple_partitioner());
if (tbb::task::self().is_cancelled())
throw std::runtime_error("task cancelled");
#endif
}
typedef tbb::affinity_partitioner affinity_partitioner;
template<typename Index, typename Func>
__forceinline void parallel_for_affinity( const Index N, const Func& func, tbb::affinity_partitioner& ap)
{
#if TBB_INTERFACE_VERSION >= 12002
tbb::task_group_context context;
tbb::parallel_for(Index(0),N,Index(1),[&](Index i) {
func(i);
},ap,context);
if (context.is_group_execution_cancelled())
throw std::runtime_error("task cancelled");
#else
tbb::parallel_for(Index(0),N,Index(1),[&](Index i) {
func(i);
},ap);
if (tbb::task::self().is_cancelled())
throw std::runtime_error("task cancelled");
#endif
}
#else
template<typename Index, typename Func>
__forceinline void parallel_for_static( const Index N, const Func& func)
{
parallel_for(N,func);
}
struct affinity_partitioner {
};
template<typename Index, typename Func>
__forceinline void parallel_for_affinity( const Index N, const Func& func, affinity_partitioner& ap)
{
parallel_for(N,func);
}
#endif
}
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