eden/src/common/virtual_buffer.cpp

// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later

// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#ifdef _WIN32
#include <windows.h>
#else
#include <sys/mman.h>
#endif

#include "common/assert.h"
#include "common/virtual_buffer.h"

namespace Common {

void* AllocateMemoryPages(std::size_t size) noexcept {
#ifdef _WIN32
    void* base = VirtualAlloc(nullptr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
    if (base == nullptr) {
        // Probably failing to reserve is less likely than failing to commit
        base = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
    }
#else
    void* base = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
    if (base == MAP_FAILED)
        base = nullptr;
#endif
    ASSERT(base);
    return base;
}

void FreeMemoryPages(void* base, [[maybe_unused]] std::size_t size) noexcept {
    if (!base)
        return;
#ifdef _WIN32
    ASSERT(VirtualFree(base, 0, MEM_RELEASE));
#else
    ASSERT(munmap(base, size) == 0);
#endif
}

} // namespace Common