Synchronization via atomic operations .....................................................................54
Synchronization services implementation .................................................................55
Clock and timer services ..................................................................................................56
Time correction .....................................................................................................57
Timers ..................................................................................................................57
Interrupt handling ...........................................................................................................60
Interrupt latency ...................................................................................................60
Scheduling latency ................................................................................................61
Nested interrupts ..................................................................................................61
Interrupt calls .......................................................................................................62
Chapter 3: Interprocess Communication (IPC) .............................................................................67
Synchronous message passing .........................................................................................68
Message copying ............................................................................................................71
Simple messages ............................................................................................................74
Channels and connections ...............................................................................................75
Pulses ..................................................................................................................76
Priority inheritance and messages ...........................................................................77
Message-passing API ......................................................................................................78
Robust implementations with Send/Receive/Reply .............................................................79
Events ...........................................................................................................................81
I/O notification ......................................................................................................82
Signals ..........................................................................................................................83
Special signals ......................................................................................................84
Summary of signals ...............................................................................................86
POSIX message queues ...................................................................................................89
Why use POSIX message queues? ...........................................................................89
File-like interface ..................................................................................................89
Message-queue functions .......................................................................................90
Shared memory ..............................................................................................................91
Shared memory with message passing .....................................................................91
Creating a shared-memory object ............................................................................92
mmap() ................................................................................................................93
Initializing allocated memory ..................................................................................96
Typed memory ................................................................................................................99
Implementation-defined behavior ............................................................................99
Practical examples ..............................................................................................103
Pipes and FIFOs ...........................................................................................................105
Chapter 4: The Instrumented Microkernel .................................................................................107
Instrumentation at a glance ...........................................................................................108
Event control ................................................................................................................109
Modes of emission ...............................................................................................109
Ring buffer .........................................................................................................110
Table of Contents
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