89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright © 2010-2014 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef BRW_IR_ALLOCATOR_H
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#define BRW_IR_ALLOCATOR_H
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#include "main/macros.h"
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namespace brw {
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/**
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* Simple allocator used to keep track of virtual GRFs.
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*/
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class simple_allocator {
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public:
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simple_allocator() :
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sizes(NULL), offsets(NULL), count(0), total_size(0), capacity(0)
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{
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}
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~simple_allocator()
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{
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free(offsets);
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free(sizes);
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}
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unsigned
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allocate(unsigned size)
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{
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assert(size > 0);
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if (capacity <= count) {
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capacity = MAX2(16, capacity * 2);
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sizes = (unsigned *)realloc(sizes, capacity * sizeof(unsigned));
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offsets = (unsigned *)realloc(offsets, capacity * sizeof(unsigned));
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}
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sizes[count] = size;
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offsets[count] = total_size;
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total_size += size;
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return count++;
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}
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/**
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* Array of sizes for each allocation. The allocation unit is up to the
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* back-end, but it's expected to be one scalar value in the FS back-end
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* and one vec4 in the VEC4 back-end.
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*/
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unsigned *sizes;
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/**
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* Array of offsets from the start of the VGRF space in allocation
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* units.
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*/
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unsigned *offsets;
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/** Total number of VGRFs allocated. */
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unsigned count;
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/** Cumulative size in allocation units. */
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unsigned total_size;
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private:
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unsigned capacity;
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};
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}
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#endif
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