diff --git a/wpilibc/shared/src/Resource.cpp b/wpilibc/shared/src/Resource.cpp
new file mode 100644
index 0000000..7f9e476
--- /dev/null
+++ b/wpilibc/shared/src/Resource.cpp
@@ -0,0 +1,101 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008. 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 $(WIND_BASE)/WPILib.  */
+/*----------------------------------------------------------------------------*/
+
+#include "Resource.h"
+#include "WPIErrors.h"
+#include "ErrorBase.h"
+
+priority_recursive_mutex Resource::m_createLock;
+
+/**
+ * Allocate storage for a new instance of Resource.
+ * Allocate a bool array of values that will get initialized to indicate that no
+ * resources
+ * have been allocated yet. The indicies of the resources are [0 .. elements -
+ * 1].
+ */
+Resource::Resource(uint32_t elements) {
+  std::lock_guard<priority_recursive_mutex> sync(m_createLock);
+  m_isAllocated = std::vector<bool>(elements, false);
+}
+
+/**
+ * Factory method to create a Resource allocation-tracker *if* needed.
+ *
+ * @param r -- address of the caller's Resource pointer. If *r == nullptr, this
+ *    will construct a Resource and make *r point to it. If *r != nullptr, i.e.
+ *    the caller already has a Resource instance, this won't do anything.
+ * @param elements -- the number of elements for this Resource allocator to
+ *    track, that is, it will allocate resource numbers in the range
+ *    [0 .. elements - 1].
+ */
+/*static*/ void Resource::CreateResourceObject(std::unique_ptr<Resource>& r,
+                                               uint32_t elements) {
+  std::lock_guard<priority_recursive_mutex> sync(m_createLock);
+  if (!r) {
+    r = std::make_unique<Resource>(elements);
+  }
+}
+
+/**
+ * Allocate a resource.
+ * When a resource is requested, mark it allocated. In this case, a free
+ * resource value
+ * within the range is located and returned after it is marked allocated.
+ */
+uint32_t Resource::Allocate(const std::string &resourceDesc) {
+  std::lock_guard<priority_recursive_mutex> sync(m_allocateLock);
+  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();
+}
+
+/**
+ * Allocate a specific resource value.
+ * The user requests a specific resource value, i.e. channel number and it is
+ * verified
+ * unallocated, then returned.
+ */
+uint32_t Resource::Allocate(uint32_t index, const std::string &resourceDesc) {
+  std::lock_guard<priority_recursive_mutex> sync(m_allocateLock);
+  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;
+}
+
+/**
+ * Free an allocated resource.
+ * After a resource is no longer needed, for example a destructor is called for
+ * a channel assignment
+ * class, Free will release the resource value so it can be reused somewhere
+ * else in the program.
+ */
+void Resource::Free(uint32_t index) {
+  std::unique_lock<priority_recursive_mutex> sync(m_allocateLock);
+  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;
+}