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46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/** Memory managment.
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*
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* @author Daniel Krebs <github@daniel-krebs.net>
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* @copyright 2017-2018, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASfpga
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <sys/mman.h>
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#include <unistd.h>
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#include <villas/memory.hpp>
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namespace villas {
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bool
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HostRam::free(void* addr, size_t length)
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{
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return munmap(addr, length) == 0;
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}
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void*
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HostRam::allocate(size_t length, int flags)
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{
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const int mmap_flags = flags | MAP_PRIVATE | MAP_ANONYMOUS | MAP_32BIT;
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const int mmap_protection = PROT_READ | PROT_WRITE;
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return mmap(nullptr, length, mmap_protection, mmap_flags, 0, 0);
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}
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} // namespace villas
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