Danny Robson
c2265b9ed2
sometimes we need to ensure memory allocation has a particular alignment in an _offset_ buffer (which we have no control over, eg renderdoc's OpenGL buffers). this applies an offset to various operations that make the aligned::direct allocator correctly align allocations for buffers that aren't themselves aligned.
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
#include "tap.hpp"
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#include "alloc/raw/linear.hpp"
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///////////////////////////////////////////////////////////////////////////////
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int
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main (void)
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{
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util::TAP::logger tap;
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constexpr size_t BUFFER_SIZE = 1024;
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alignas (std::max_align_t) std::byte memory[BUFFER_SIZE];
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util::alloc::raw::linear store (util::make_view (memory));
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tap.expect_eq (store.begin (), std::begin (memory), "base pointers match");
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tap.expect_eq (store.offset (std::begin (memory)), 0u, "base offset is 0");
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tap.expect_eq (store.capacity (), BUFFER_SIZE, "bytes capacity matches");
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tap.expect_throw<std::bad_alloc> (
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[&] (void) { store.allocate (BUFFER_SIZE + 1, 1); },
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"excessive allocation throws bad_alloc"
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);
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tap.expect_nothrow (
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[&] (void) { store.allocate (BUFFER_SIZE); },
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"maximum allocation succeeds"
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);
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tap.expect_eq (store.used (), BUFFER_SIZE, "bytes used matches");
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tap.expect_eq (store.remain (), 0u, "bytes remain matches");
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tap.expect_throw<std::bad_alloc> (
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[&] (void) { store.allocate (1, 1); },
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"minimum allocation fails after exhaustion"
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);
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store.reset ();
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tap.expect_nothrow (
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[&] (void) { store.allocate (1, 1); },
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"minimum allocation succeeds after reset"
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);
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return tap.status ();
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}
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