[libcamera-devel,v4,09/22] libcamera: file: Manage fd by UniqueFD

14865 diff mbox series

diff --git a/include/libcamera/base/file.h b/include/libcamera/base/file.h
index 9b62871b8230..dfb8dd0f19af 100644
--- a/include/libcamera/base/file.h
+++ b/include/libcamera/base/file.h
@@ -17,6 +17,7 @@ 
 #include <libcamera/base/class.h>
 #include <libcamera/base/flags.h>
 #include <libcamera/base/span.h>
+#include <libcamera/base/unique_fd.h>
 
 namespace libcamera {
 
@@ -50,7 +51,7 @@  public:
 	bool exists() const;
 
 	bool open(OpenMode mode);
-	bool isOpen() const { return fd_ != -1; }
+	bool isOpen() const { return fd_.isValid(); }
 	OpenMode openMode() const { return mode_; }
 	void close();
 
@@ -75,7 +76,7 @@  private:
 	void unmapAll();
 
 	std::string name_;
-	int fd_;
+	UniqueFD fd_;
 	OpenMode mode_;
 
 	int error_;
diff --git a/src/libcamera/base/file.cpp b/src/libcamera/base/file.cpp
index a04dfacdc102..cab6e714fb07 100644
--- a/src/libcamera/base/file.cpp
+++ b/src/libcamera/base/file.cpp
@@ -84,7 +84,7 @@  LOG_DEFINE_CATEGORY(File)
  * before performing I/O operations.
  */
 File::File(const std::string &name)
-	: name_(name), fd_(-1), mode_(OpenModeFlag::NotOpen), error_(0)
+	: name_(name), mode_(OpenModeFlag::NotOpen), error_(0)
 {
 }
 
@@ -95,7 +95,7 @@  File::File(const std::string &name)
  * setFileName().
  */
 File::File()
-	: fd_(-1), mode_(OpenModeFlag::NotOpen), error_(0)
+	: mode_(OpenModeFlag::NotOpen), error_(0)
 {
 }
 
@@ -178,8 +178,8 @@  bool File::open(File::OpenMode mode)
 	if (mode & OpenModeFlag::WriteOnly)
 		flags |= O_CREAT;
 
-	fd_ = ::open(name_.c_str(), flags, 0666);
-	if (fd_ < 0) {
+	fd_ = UniqueFD(::open(name_.c_str(), flags, 0666));
+	if (!fd_.isValid()) {
 		error_ = -errno;
 		return false;
 	}
@@ -210,11 +210,10 @@  bool File::open(File::OpenMode mode)
  */
 void File::close()
 {
-	if (fd_ == -1)
+	if (!fd_.isValid())
 		return;
 
-	::close(fd_);
-	fd_ = -1;
+	fd_.reset();
 	mode_ = OpenModeFlag::NotOpen;
 }
 
@@ -244,7 +243,7 @@  ssize_t File::size() const
 		return -EINVAL;
 
 	struct stat st;
-	int ret = fstat(fd_, &st);
+	int ret = fstat(fd_.get(), &st);
 	if (ret < 0)
 		return -errno;
 
@@ -263,7 +262,7 @@  off_t File::pos() const
 	if (!isOpen())
 		return 0;
 
-	return lseek(fd_, 0, SEEK_CUR);
+	return lseek(fd_.get(), 0, SEEK_CUR);
 }
 
 /**
@@ -277,7 +276,7 @@  off_t File::seek(off_t pos)
 	if (!isOpen())
 		return -EINVAL;
 
-	off_t ret = lseek(fd_, pos, SEEK_SET);
+	off_t ret = lseek(fd_.get(), pos, SEEK_SET);
 	if (ret < 0)
 		return -errno;
 
@@ -309,7 +308,7 @@  ssize_t File::read(const Span<uint8_t> &data)
 
 	/* Retry in case of interrupted system calls. */
 	while (readBytes < data.size()) {
-		ret = ::read(fd_, data.data() + readBytes,
+		ret = ::read(fd_.get(), data.data() + readBytes,
 			     data.size() - readBytes);
 		if (ret <= 0)
 			break;
@@ -346,7 +345,7 @@  ssize_t File::write(const Span<const uint8_t> &data)
 
 	/* Retry in case of interrupted system calls. */
 	while (writtenBytes < data.size()) {
-		ssize_t ret = ::write(fd_, data.data() + writtenBytes,
+		ssize_t ret = ::write(fd_.get(), data.data() + writtenBytes,
 				      data.size() - writtenBytes);
 		if (ret <= 0)
 			break;
@@ -409,7 +408,7 @@  Span<uint8_t> File::map(off_t offset, ssize_t size, File::MapFlags flags)
 	if (flags & MapFlag::Private)
 		prot |= PROT_WRITE;
 
-	void *map = mmap(NULL, size, prot, mmapFlags, fd_, offset);
+	void *map = mmap(NULL, size, prot, mmapFlags, fd_.get(), offset);
 	if (map == MAP_FAILED) {
 		error_ = -errno;
 		return {};