Rename our allwpilib (which is now 2020) to not have 2019 in the name
Change-Id: I3c07f85ed32ab8b97db765a9b43f2a6ce7da964a
diff --git a/wpilibc/src/main/native/cpp/Resource.cpp b/wpilibc/src/main/native/cpp/Resource.cpp
new file mode 100644
index 0000000..d546461
--- /dev/null
+++ b/wpilibc/src/main/native/cpp/Resource.cpp
@@ -0,0 +1,67 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved. */
+/* Open Source Software - may be modified and shared by FRC teams. The code */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project. */
+/*----------------------------------------------------------------------------*/
+
+#include "frc/Resource.h"
+
+#include "frc/ErrorBase.h"
+#include "frc/WPIErrors.h"
+
+using namespace frc;
+
+wpi::mutex Resource::m_createMutex;
+
+void Resource::CreateResourceObject(std::unique_ptr<Resource>& r,
+ uint32_t elements) {
+ std::scoped_lock lock(m_createMutex);
+ if (!r) {
+ r = std::make_unique<Resource>(elements);
+ }
+}
+
+Resource::Resource(uint32_t elements) {
+ m_isAllocated = std::vector<bool>(elements, false);
+}
+
+uint32_t Resource::Allocate(const std::string& resourceDesc) {
+ std::scoped_lock lock(m_allocateMutex);
+ for (uint32_t i = 0; i < m_isAllocated.size(); i++) {
+ if (!m_isAllocated[i]) {
+ m_isAllocated[i] = true;
+ return i;
+ }
+ }
+ wpi_setWPIErrorWithContext(NoAvailableResources, resourceDesc);
+ return std::numeric_limits<uint32_t>::max();
+}
+
+uint32_t Resource::Allocate(uint32_t index, const std::string& resourceDesc) {
+ std::scoped_lock lock(m_allocateMutex);
+ if (index >= m_isAllocated.size()) {
+ wpi_setWPIErrorWithContext(ChannelIndexOutOfRange, resourceDesc);
+ return std::numeric_limits<uint32_t>::max();
+ }
+ if (m_isAllocated[index]) {
+ wpi_setWPIErrorWithContext(ResourceAlreadyAllocated, resourceDesc);
+ return std::numeric_limits<uint32_t>::max();
+ }
+ m_isAllocated[index] = true;
+ return index;
+}
+
+void Resource::Free(uint32_t index) {
+ std::unique_lock lock(m_allocateMutex);
+ if (index == std::numeric_limits<uint32_t>::max()) return;
+ if (index >= m_isAllocated.size()) {
+ wpi_setWPIError(NotAllocated);
+ return;
+ }
+ if (!m_isAllocated[index]) {
+ wpi_setWPIError(NotAllocated);
+ return;
+ }
+ m_isAllocated[index] = false;
+}