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#include "MappedFile.h"
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cstdio>
namespace AK {
MappedFile::MappedFile(String&& fileName)
: m_fileName(std::move(fileName))
{
m_fileLength = 1024;
m_fd = open(m_fileName.characters(), O_RDONLY);
if (m_fd != -1) {
struct stat st;
fstat(m_fd, &st);
m_fileLength = st.st_size;
m_map = mmap(nullptr, m_fileLength, PROT_READ, MAP_SHARED, m_fd, 0);
if (m_map == MAP_FAILED)
perror("");
}
printf("MappedFile{%s} := { m_fd=%d, m_fileLength=%zu, m_map=%p }\n", m_fileName.characters(), m_fd, m_fileLength, m_map);
}
MappedFile::~MappedFile()
{
if (m_map != (void*)-1) {
ASSERT(m_fd != -1);
munmap(m_map, m_fileLength);
}
}
MappedFile::MappedFile(MappedFile&& other)
: m_fileName(std::move(other.m_fileName))
, m_fileLength(other.m_fileLength)
, m_fd(other.m_fd)
, m_map(other.m_map)
{
other.m_fileLength = 0;
other.m_fd = -1;
other.m_map = (void*)-1;
}
}
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