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base: hide slab implementation details from API

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Issue #1908
This commit is contained in:
Norman Feske
2016-03-31 18:17:07 +02:00
committed by Christian Helmuth
parent db5969e6cc
commit fbc35cb796
16 changed files with 406 additions and 386 deletions
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32
repos/dde_bsd/src/lib/audio/mem.cc
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@ -127,31 +127,29 @@ class Bsd::Slab_alloc : public Genode::Slab
{
private:
/*
* Each slab block in the slab contains about 8 objects (slab entries)
* as proposed in the paper by Bonwick and block sizes are multiples of
* page size.
*/
static size_t _calculate_block_size(size_t object_size)
Genode::size_t const _object_size;
static Genode::size_t _calculate_block_size(Genode::size_t object_size)
{
size_t block_size = 8 * (object_size + sizeof(Genode::Slab_entry))
+ sizeof(Genode::Slab_block);
Genode::size_t const block_size = 16*object_size;
return Genode::align_addr(block_size, 12);
}
public:
Slab_alloc(size_t object_size, Slab_backend_alloc &allocator)
: Slab(object_size, _calculate_block_size(object_size), 0, &allocator) { }
Slab_alloc(Genode::size_t object_size, Slab_backend_alloc &allocator)
:
Slab(object_size, _calculate_block_size(object_size), 0, &allocator),
_object_size(object_size)
{ }
/**
* Convenience slabe-entry allocation
*/
addr_t alloc()
Genode::addr_t alloc()
{
addr_t result;
return (Slab::alloc(slab_size(), (void **)&result) ? result : 0);
Genode::addr_t result;
return (Slab::alloc(_object_size, (void **)&result) ? result : 0);
}
void free(void *ptr) { Slab::free(ptr, _object_size); }
};
@ -164,7 +162,7 @@ class Bsd::Malloc
enum {
SLAB_START_LOG2 = 5, /* 32 B */
SLAB_STOP_LOG2 = 17, /* 64 KiB */
SLAB_STOP_LOG2 = 16, /* 64 KiB */
NUM_SLABS = (SLAB_STOP_LOG2 - SLAB_START_LOG2) + 1,
};