const_buffer

Holds a buffer that cannot be modified.

class const_buffer

Member Functions

Name	Description
const_buffer	Construct an empty buffer. — Construct a buffer to represent a given memory range. — Construct a non-modifiable buffer from a modifiable one.
data	Get a pointer to the beginning of the memory range.
operator+=	Move the start of the buffer by the specified number of bytes.
size	Get the size of the memory range.

Related Functions

Name	Description
operator+	Create a new non-modifiable buffer that is offset from the start of another.

The const_buffer class provides a safe representation of a buffer that cannot be modified. It does not own the underlying data, and so is cheap to copy or assign.

Accessing Buffer Contents

The contents of a buffer may be accessed using the data() and size() member functions:

boost::asio::const_buffer b1 = ...;
std::size_t s1 = b1.size();
const unsigned char* p1 = static_cast<const unsigned char*>(b1.data());

The data() member function permits violations of type safety, so uses of it in application code should be carefully considered.

Requirements

Header: boost/asio/buffer.hpp

Convenience header: boost/asio.hpp