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Revert "libutil: drop Pool resources on exceptional free"

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This reverts commit de2884b82b376d10de5c400d8e73bc7d98f195d2.

Change-Id: I1fa301149d7c2ed3d266a40c15b2d010e12e44e6
This commit is contained in:
eldritch horrors 2024-04-05 03:52:51 +02:00
parent 52f741c23a
commit 38dc6f5b69
2 changed files with 1 additions and 23 deletions
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9
src/libutil/pool.hh
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@ -1,7 +1,6 @@
#pragma once #pragma once
///@file ///@file
#include <exception>
#include <functional> #include <functional>
#include <limits> #include <limits>
#include <list> #include <list>
@ -119,7 +118,7 @@ public:
if (!r) return; if (!r) return;
{ {
auto state_(pool.state.lock()); auto state_(pool.state.lock());
if (!bad && !std::uncaught_exceptions()) if (!bad)
state_->idle.push_back(ref<R>(r)); state_->idle.push_back(ref<R>(r));
assert(state_->inUse); assert(state_->inUse);
state_->inUse--; state_->inUse--;
@ -135,12 +134,6 @@ public:
Handle get() Handle get()
{ {
// we do not want to handle the complexity that comes with allocating
// resources during stack unwinding. it would be possible to do this,
// but doing so requires more per-handle bookkeeping to properly free
// resources allocated during unwinding. that effort is not worth it.
assert(std::uncaught_exceptions() == 0);
{ {
auto state_(state.lock()); auto state_(state.lock());

15
tests/unit/libutil/pool.cc
View file

@ -109,19 +109,4 @@ namespace nix {
ASSERT_NE(h->num, counter); ASSERT_NE(h->num, counter);
} }
} }
TEST(Pool, throwingOperationDropsResource)
{
auto createResource = []() { return make_ref<TestResource>(); };
Pool<TestResource> pool = Pool<TestResource>((size_t)1, createResource);
ASSERT_THROW({
auto _r = pool.get();
ASSERT_EQ(pool.count(), 1);
throw 1;
}, int);
ASSERT_EQ(pool.count(), 0);
}
} }