PRDescIdentity

NSPR
About NSPR
NSPR API Reference
NSPR Build Instruction
NSPR Release Process
Introduction to NSPR
NSPR Types
Threads
1. Threading Types and Constants
2. Threading Functions
Process Initialization
Locks
1. Lock Type
2. Lock Functions
Condition Variables
1. Condition Variable Type
2. Condition Variable Functions
Monitors
1. Monitor Type
2. Monitor Functions
Cached Monitors
1. Cached Monitor Functions
I/O Types
I/O Functions
Network Addresses
1. Network Address Types and Constants
2. Network Address Functions
Atomic Operations
Interval Timing
1. Interval Time Type and Constants
2. Interval Functions
Date and Time
Memory Management Operations
1. Memory Allocation Functions
2. Memory Allocation Macros
String Operations
Floating Point Number to String Conversion
Linked Lists
1. Linked List Types
  1. PRCList
2. Linked List Macros
Dynamic Library Linking
Process Management and Interprocess Communication
1. Process Management Types and Constants
  1. PRProcess
  2. PRProcessAttr
2. Process Management Functions
  1. Setting the Attributes of a New Process
  2. Creating and Managing Processes
Logging
Named Shared Memory
1. Shared Memory Protocol
2. Named Shared Memory Functions
Anonymous Shared Memory
1. Anonymous Memory Protocol
2. Anonymous Shared Memory Functions
IPC Semaphores
1. IPC Semaphore Functions
Thread Pools
1. Thread Pool Types
2. Thread Pool Functions
Random Number Generator
1. Random Number Generator Function
Hash Tables
1. Hash Tables and Type Constants
2. Hash Table Functions
NSPR Error Handling
Contribute
2. The MDN Project

Syntax

Description

File descriptors may be layered. Each layer has it own identity. Identities are allocated by the runtime and are to be associated (by the layer implementor) with all file descriptors of that layer. It is then possible to scan the chain of layers and find a layer that one recognizes, then predict that it will implement a desired protocol.

Layers are created by PR_GetUniqueIdentity. A string may be associated with a layer when the layer is created. The string is copied by the runtime, and PR_GetNameForIdentity returns a reference to that copy. There is no way to delete a layer's identity after the layer is created.