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https://github.com/wpilibsuite/allwpilib
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45 lines
1.8 KiB
C++
45 lines
1.8 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) 2017 FIRST. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in the root directory of */
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/* the project. */
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/*----------------------------------------------------------------------------*/
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#include "NotifyCallbackHelpers.h"
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using namespace hal;
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std::shared_ptr<NotifyListenerVector> RegisterCallback(
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std::shared_ptr<NotifyListenerVector> currentVector, const char* name,
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HAL_NotifyCallback callback, void* param, int32_t* newUid) {
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std::shared_ptr<NotifyListenerVector> newCallbacks;
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if (currentVector == nullptr) {
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newCallbacks = std::make_shared<NotifyListenerVector>(
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param, callback, reinterpret_cast<unsigned int*>(newUid));
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} else {
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newCallbacks = currentVector->emplace_back(
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param, callback, reinterpret_cast<unsigned int*>(newUid));
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}
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return newCallbacks;
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}
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std::shared_ptr<NotifyListenerVector> CancelCallback(
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std::shared_ptr<NotifyListenerVector> currentVector, int32_t uid) {
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// Create a copy of the callbacks to erase from
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auto newCallbacks = currentVector->erase(uid);
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return newCallbacks;
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}
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void InvokeCallback(std::shared_ptr<NotifyListenerVector> currentVector,
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const char* name, const HAL_Value* value) {
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// Return if no callbacks are assigned
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if (currentVector == nullptr) return;
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// Get a copy of the shared_ptr, then iterate and callback listeners
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auto newCallbacks = currentVector;
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for (size_t i = 0; i < newCallbacks->size(); ++i) {
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if (!(*newCallbacks)[i]) continue; // removed
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auto listener = (*newCallbacks)[i];
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listener.callback(name, listener.param, value);
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}
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}
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