Creates or opens a named semaphore with the specified name

Syntax

#include <prshma.h>

NSPR_API( PRFileMap *)
PR_OpenAnonFileMap(
  const char *dirName,
  PRSize size,
  PRFileMapProtect prot
);

Parameters

The function has the following parameters:

dirName

A pointer to a directory name that will contain the anonymous file.

size

The size of the shared memory.

prot

How the shared memory is mapped.

Returns

Pointer to PRFileMap or NULL on error.

Description

If the shared memory already exists, a handle is returned to that shared memory object.

On Unix platforms, PR_OpenAnonFileMap uses dirName as a directory name, without the trailing '/', to contain the anonymous file. A filename is generated for the name.

On Windows platforms, dirName is ignored.