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Font: Clean up AK::MappedFile and use it for mapping font files.

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This commit is contained in:
Andreas Kling 2019-04-03 13:51:49 +02:00
parent ab6bd3872b
commit 3dc3754cde
5 changed files with 48 additions and 37 deletions
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45
AK/MappedFile.cpp
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@ -1,15 +1,16 @@
#include "MappedFile.h"
#include <AK/MappedFile.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cstdio>
#include <unistd.h>
#include <stdio.h>
namespace AK {
MappedFile::MappedFile(String&& file_name)
: m_file_name(std::move(file_name))
MappedFile::MappedFile(const String& file_name)
: m_file_name(file_name)
{
m_file_length = 1024;
m_file_length = PAGE_SIZE;
m_fd = open(m_file_name.characters(), O_RDONLY);
if (m_fd != -1) {
@ -22,19 +23,29 @@ MappedFile::MappedFile(String&& file_name)
perror("");
}
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);
dbgprintf("MappedFile{%s} := { m_fd=%d, m_file_length=%zu, m_map=%p }\n", m_file_name.characters(), m_fd, m_file_length, m_map);
}
MappedFile::~MappedFile()
{
if (m_map != (void*)-1) {
ASSERT(m_fd != -1);
munmap(m_map, m_file_length);
}
unmap();
}
void MappedFile::unmap()
{
if (!is_valid())
return;
ASSERT(m_fd != -1);
int rc = munmap(m_map, m_file_length);
ASSERT(rc == 0);
m_file_name = { };
m_file_length = 0;
m_fd = -1;
m_map = (void*)-1;
}
MappedFile::MappedFile(MappedFile&& other)
: m_file_name(std::move(other.m_file_name))
: m_file_name(move(other.m_file_name))
, m_file_length(other.m_file_length)
, m_fd(other.m_fd)
, m_map(other.m_map)
@ -44,5 +55,17 @@ MappedFile::MappedFile(MappedFile&& other)
other.m_map = (void*)-1;
}
MappedFile& MappedFile::operator=(MappedFile&& other)
{
if (this == &other)
return *this;
unmap();
swap(m_file_name, other.m_file_name);
swap(m_file_length, other.m_file_length);
swap(m_fd, other.m_fd);
swap(m_map, other.m_map);
return *this;
}
}