Inside NT's Asynchronous Procedure Call
By Albert Almeida, November 01, 2002
Asynchronous Procedure Calls (APCs) are a fundamental building block in NT's asynchronous processing architecture. Learn how NT processes APCs and documents the exported NT functions available to device driver writers to use APCs in their programs.
November 2002/Inside NT's Asynchronous Procedure Call
Listing 1 Definition for a KAPC object
typedef struct _KAPC {
CSHORT Type;
CSHORT Size;
ULONG Spare0;
struct _KTHREAD *Thread;
LIST_ENTRY ApcListEntry;
PKKERNEL_ROUTINE KernelRoutine;
PKRUNDOWN_ROUTINE RundownRoutine;
PKNORMAL_ROUTINE NormalRoutine;
PVOID NormalContext;
//
// N.B. The following two members MUST be together.
//
PVOID SystemArgument1;
PVOID SystemArgument2;
CCHAR ApcStateIndex;
KPROCESSOR_MODE ApcMode;
BOOLEAN Inserted;
} KAPC, *PKAPC, *RESTRICTED_POINTER PRKAPC;
