nt-lite/code/kernel/include/kernel/ke_work.h

// Kernel passive-level work queue declarations.

#pragma once
#include <stdbool.h>
#include <kernel/ke_list.h>
#include <ntlite/status.h>

// Work items are caller-owned embedded objects.  They may be queued from
// interrupt/DPC/spinlock context and run later on a persistent system worker
// thread at PASSIVE_LEVEL.  Queueing the same item while it is already queued
// is coalesced.
typedef void (*KWORK_ROUTINE)(void* context);

typedef struct KWORK_ITEM {
    LIST_ENTRY Link;
    KWORK_ROUTINE Routine;
    void* Context;
    volatile long Queued;
} KWORK_ITEM;

void KeInitializeWorkItem(KWORK_ITEM* item, KWORK_ROUTINE routine, void* context);
KSTATUS KeStartWorkQueue(void);
bool KeIsWorkQueueStarted(void);
bool KeQueueWorkItem(KWORK_ITEM* item);