PR_OpenAnonFileMap

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.