gplib/include/gp/utils/allocators/bottleneck_allocator.hpp

#pragma once

#include "gp/utils/allocators/allocator.hpp"
#include "gp/ipc/bottleneck.hpp"

namespace gp {
    /**
     * @brief A front to make allocators thread safe
     */
    class bottleneck_allocator_front : public allocator {
        allocator& backend;
        fast_bottleneck lock;
    public: 
        bottleneck_allocator_front(allocator& _backend) 
        : backend(_backend)
        , lock()
        {}

		/**
		 * @brief Allocates memory, THREAD SAFE
		 *
		 * @param sz the amount of bytes to allocate
		 * 
		 * @return the allocated memory as a pointer on success
		 * @return nullptr if it failed allocating
		 */
		virtual void* allocate(size_t sz) {
            auto guard = lock_guard(lock);
            return backend.allocate(sz);
        }

		/**
		 * @brief Deallocates memory, THREAD SAFE
		 *
		 * @param ptr the memory to deallocate
		 * 
		 * @return true if the memory was successfully deallocated
		 * @return false if the memory was not deallocated
		 */
		virtual bool deallocate(void* ptr) {
            auto guard = lock_guard(lock);
            return backend.deallocate(ptr);
        }

		/**
		 * @brief Tries to reallocate memory, THREAD SAFE
		 *
		 * @param ptr The memory to reallocate
		 * @param sz The new size we want to give the memory
		 * 
		 * @return true if reallocation was successful
		 * @return false if the reallocation failed
		 */
		virtual bool try_reallocate(void* ptr, size_t sz) {
            auto guard = lock_guard(lock);
            return backend.try_reallocate(ptr, sz);
        }

		virtual ~bottleneck_allocator_front() = default;
    };
}