pnpimpl.cpp

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/* SPDX-License-Identifier: MIT */
#include "ajabase/pnp/windows/pnpimpl.h"
#include "ajabase/system/systemtime.h"
#include "ajabase/system/debug.h"
 
#define PNPFAIL(__x__) AJA_sREPORT(AJA_DebugUnit_PnP, AJA_DebugSeverity_Error,      __func__ << ": " << __x__)
#define PNPWARN(__x__) AJA_sREPORT(AJA_DebugUnit_PnP, AJA_DebugSeverity_Warning,    __func__ << ": " << __x__)
#define PNPNOTE(__x__) AJA_sREPORT(AJA_DebugUnit_PnP, AJA_DebugSeverity_Notice,     __func__ << ": " << __x__)
#define PNPINFO(__x__) AJA_sREPORT(AJA_DebugUnit_PnP, AJA_DebugSeverity_Info,       __func__ << ": " << __x__)
#define PNPDBG(__x__)  AJA_sREPORT(AJA_DebugUnit_PnP, AJA_DebugSeverity_Debug,      __func__ << ": " << __x__)
 
 
static void CALLBACK SignaledAddRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
    AJAPnpImpl *context = (AJAPnpImpl*)lpParam;
    context->AddSignaled();
 
}
 
static void CALLBACK SignaledRemoveRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
    AJAPnpImpl *context = (AJAPnpImpl*)lpParam;
    context->RemoveSignaled();
 
}
 
AJAPnpImpl::AJAPnpImpl() : mRefCon(NULL), mCallback(NULL), mDevices(0), mAddEventHandle(NULL), mAddWaitHandle(NULL), mRemoveEventHandle(NULL), mRemoveWaitHandle(NULL)
{
}
 
 
AJAPnpImpl::~AJAPnpImpl()
{
    Uninstall();
}
 
 
AJAStatus AJAPnpImpl::Install(AJAPnpCallback callback, void* refCon, uint32_t devices)
{
    mCallback = callback;
    mRefCon   = refCon;
    mDevices  = devices;
 
    if (!mCallback)
        {PNPFAIL("NULL callback");  return AJA_STATUS_NULL;}
 
    //  Windows only handles PCIe devices
    if (mDevices & AJA_Pnp_PciVideoDevices)
    {
        mAddEventHandle = CreateEventW(NULL, FALSE, FALSE, L"Global\\AJAPNPAddEvent");
        if (!mAddEventHandle)
            {PNPFAIL("NULL handle from CreateEventW for 'Global\\AJAPNPAddEvent'");  return AJA_STATUS_FAIL;}
        if (!RegisterWaitForSingleObject(&mAddWaitHandle, mAddEventHandle, (WAITORTIMERCALLBACK)&SignaledAddRoutine, this, INFINITE, NULL))
            {PNPFAIL("RegisterWaitForSingleObject failed for 'Global\\AJAPNPAddEvent'");  return AJA_STATUS_FAIL;}
 
        mRemoveEventHandle = CreateEventW(NULL, FALSE, FALSE, L"Global\\AJAPNPRemoveEvent");
        if (!mRemoveEventHandle)
            {PNPFAIL("NULL handle from CreateEventW for 'Global\\AJAPNPRemoveEvent'");  return AJA_STATUS_FAIL;}
        if (!RegisterWaitForSingleObject(&mRemoveWaitHandle, mRemoveEventHandle, (WAITORTIMERCALLBACK)&SignaledRemoveRoutine, this, INFINITE, NULL))
            {PNPFAIL("RegisterWaitForSingleObject failed for 'Global\\AJAPNPRemoveEvent'");  return AJA_STATUS_FAIL;}
 
        PNPINFO("Callback installation succeeded");
        return AJA_STATUS_SUCCESS;
    }
    PNPFAIL("'AJA_Pnp_PciVideoDevices' not set, AJAPnp callback not installed");
    return AJA_STATUS_FAIL; //  Nothing installed
}
    
AJAStatus AJAPnpImpl::Uninstall(void)
{
    mCallback = NULL;
    mRefCon = NULL;
    mDevices = 0;
    
    if (mAddWaitHandle || mRemoveWaitHandle)
        PNPINFO("Callback uninstalled");
    if (mAddWaitHandle != NULL)
    {
        UnregisterWait(mAddWaitHandle);
        mAddWaitHandle = NULL;
    }
    if (mRemoveWaitHandle != NULL)
    {
        UnregisterWait(mRemoveWaitHandle);
        mRemoveWaitHandle = NULL;
    }
    return AJA_STATUS_SUCCESS;
}
 
void AJAPnpImpl::AddSignaled()
{
    PNPNOTE("'Device added' signaled");
    AJATime::Sleep(1000);
    if (mCallback)
        (*(mCallback))(AJA_Pnp_DeviceAdded, mRefCon);
 
    RegisterWaitForSingleObject(&mAddWaitHandle, mAddEventHandle, (WAITORTIMERCALLBACK)SignaledAddRoutine, this, INFINITE, NULL);
}
 
void AJAPnpImpl::RemoveSignaled()
{
    PNPNOTE("'Device removed' signaled");
    if (mCallback)
        (*(mCallback))(AJA_Pnp_DeviceRemoved, mRefCon);
 
    RegisterWaitForSingleObject(&mRemoveWaitHandle, mRemoveEventHandle, (WAITORTIMERCALLBACK)SignaledRemoveRoutine, this, INFINITE, NULL);
}