__FSEXT_alloc_fd

Syntax

#include <sys/fsext.h>

int __FSEXT_alloc_fd(__FSEXT_Function *_function);

Description

This function is part of the section File System Extensions. It is used by extensions that fully emulate the I/O functions, and thus don't have a corresponding DOS file handle. This function opens DOS's `NUL' device, so as to allocate a handle that DOS won't then reuse. It also assigns the handler function for that descriptor.

The module is responsible for calling _close on the descriptor after setting the handler function to zero in the extended close handler.

Example

int socket()
{
  int fd = __FSEXT_alloc_fd(socket_handler);
  init_socket(fd);
  return fd;
}

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