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drop deprecated TBB components (#6590)

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Quite some time ago, many of the TBB components were deprecated in favor
of their near-equivalents in the STL or, in the case of task_scheduler_init,
were broken up and reconstituted under a less ad-hoc logic. Every time a header
file marked deprecated gets included, a rather loud warning is emitted, which
leads to a complete TBB's domination over the stderr stream during build time,
making it harder to notice _legitimate_ warnings.

Instead of merely muting the output with TBB_SUPPRESS_DEPRECATED_MESSAGES,
perform a genuine migration away from the deprecated components with the added
benefit of achieving a source compatibility with oneTBB, the successor to TBB
which has dropped the deprecated API for good.

What got replaced for what?

| Deprecated				| Replacement					|
| ------------------------------------- | --------------------------------------------- |
| `tbb::atomic`				| `std::atomic`					|
| `tbb::mutex`				| `std::mutex`					|
| `tbb::mutex::scoped_lock`		| `std::scoped_lock<std::mutex>`		|
| `tbb::mutex::scoped_lock` (empty)	| `std::unique_lock<std::mutex>` (deferred)	|
| `tbb::task_scheduler_init`		| `tbb::global_control`				|
| `tbb::this_thread`			| `std::this_thread`				|

Signed-off-by: Roman Beranek <roman.beranek@prusa3d.com>
This commit is contained in:
Roman Beránek 2021-06-23 11:48:48 +02:00 • committed by GitHub
parent 7a7108b2ad
commit e13535f822
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GPG key ID: 4AEE18F83AFDEB23
18 changed files with 80 additions and 95 deletions
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6
src/libslic3r/utils.cpp
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@ -43,7 +43,7 @@
#include <boost/nowide/convert.hpp>
#include <boost/nowide/cstdio.hpp>
#include <tbb/task_scheduler_init.h>
#include <tbb/global_control.h>
#if defined(__linux__) || defined(__GNUC__ )
#include <strings.h>
@ -118,9 +118,7 @@ void trace(unsigned int level, const char *message)
void disable_multi_threading()
{
// Disable parallelization so the Shiny profiler works
static tbb::task_scheduler_init *tbb_init = nullptr;
if (tbb_init == nullptr)
tbb_init = new tbb::task_scheduler_init(1);
tbb::global_control(tbb::global_control::max_allowed_parallelism, 1);
}
static std::string g_var_dir;