mirror of
https://github.com/SerenityOS/serenity
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48 lines
1 KiB
C++
48 lines
1 KiB
C++
#include "MappedFile.h"
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <cstdio>
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namespace AK {
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MappedFile::MappedFile(String&& file_name)
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: m_file_name(std::move(file_name))
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{
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m_file_length = 1024;
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m_fd = open(m_file_name.characters(), O_RDONLY);
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if (m_fd != -1) {
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struct stat st;
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fstat(m_fd, &st);
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m_file_length = st.st_size;
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m_map = mmap(nullptr, m_file_length, PROT_READ, MAP_SHARED, m_fd, 0);
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if (m_map == MAP_FAILED)
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perror("");
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}
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printf("MappedFile{%s} := { m_fd=%d, m_file_length=%zu, m_map=%p }\n", m_file_name.characters(), m_fd, m_file_length, m_map);
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}
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MappedFile::~MappedFile()
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{
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if (m_map != (void*)-1) {
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ASSERT(m_fd != -1);
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munmap(m_map, m_file_length);
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}
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}
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MappedFile::MappedFile(MappedFile&& other)
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: m_file_name(std::move(other.m_file_name))
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, m_file_length(other.m_file_length)
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, m_fd(other.m_fd)
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, m_map(other.m_map)
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{
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other.m_file_length = 0;
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other.m_fd = -1;
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other.m_map = (void*)-1;
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}
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}
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