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multi_buffer improvements:

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fix #1345

* Revise documentation
* Add reserve() member
* Add max_size() member
* Add shrink_to_fit() member
* Respect Allocator max_size
* Specify exception safety
This commit is contained in:
Vinnie Falco
2018-12-12 19:32:21 -08:00
parent 11c71d118f
commit 8262405064
4 changed files with 385 additions and 157 deletions
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test/beast/core/multi_buffer.cpp
+48
View File
@@ -442,6 +442,14 @@ public:
}
}
// max_size
{
multi_buffer b{10};
BEAST_EXPECT(b.max_size() == 10);
b.max_size(32);
BEAST_EXPECT(b.max_size() == 32);
}
// prepare
{
{
@@ -570,6 +578,46 @@ public:
BEAST_EXPECT(b.size() == 0);
}
// reserve
{
multi_buffer b;
BEAST_EXPECT(b.capacity() == 0);
b.reserve(50);
BEAST_EXPECT(b.capacity() >= 50);
b.prepare(20);
b.commit(20);
b.reserve(50);
BEAST_EXPECT(b.capacity() >= 50);
}
// shrink to fit
{
{
multi_buffer b;
BEAST_EXPECT(b.capacity() == 0);
b.prepare(50);
BEAST_EXPECT(b.capacity() >= 50);
b.commit(50);
BEAST_EXPECT(b.capacity() >= 50);
b.prepare(75);
BEAST_EXPECT(b.capacity() >= 125);
b.shrink_to_fit();
BEAST_EXPECT(b.capacity() >= b.size());
}
{
multi_buffer b;
b.prepare(2000);
BEAST_EXPECT(b.capacity() == 2000);
b.commit(1800);
BEAST_EXPECT(b.size() == 1800);
BEAST_EXPECT(b.capacity() == 2000);
b.prepare(5000);
BEAST_EXPECT(b.capacity() == 6800);
b.shrink_to_fit();
BEAST_EXPECT(b.capacity() == 2000);
}
}
// swap
{
{