fs mount points and handles

CMakeLists.txt

@@ -59,6 +59,8 @@ set(SYSTEMSERVICE_SOURCES src/core/hle/libraries/libsystemservice/system_service
 
 set(FILESYSTEM_SOURCES src/core/hle/libraries/libkernel/file_system.cpp
                        src/core/hle/libraries/libkernel/file_system.h    
+                       src/core/file_sys/fs.cpp
+                       src/core/file_sys/fs.h
 )
 
 set(HOST_SOURCES src/Emulator/Host/controller.cpp

src/core/file_sys/fs.cpp

@@ -0,0 +1,66 @@
+#include "fs.h"
+
+#include <algorithm>
+
+namespace Core::FileSys {
+void MntPoints::mount(const std::string& host_folder, const std::string& guest_folder) {
+    std::unique_lock lock{m_mutex};
+
+    MntPair pair;
+    pair.host_path = host_folder;
+    pair.guest_path = guest_folder;
+
+    m_mnt_pairs.push_back(pair);
+}
+void MntPoints::unmount(const std::string& path) {}  // TODO!
+void MntPoints::unmountAll() {
+    std::unique_lock lock{m_mutex};
+    m_mnt_pairs.clear();
+}
+std::string MntPoints::getHostDirectory(const std::string& guest_directory) {
+    std::unique_lock lock{m_mutex};
+    for (auto& pair : m_mnt_pairs) {
+        if (pair.guest_path.starts_with(guest_directory)) {
+            return pair.host_path + guest_directory;
+        }
+    }
+    // hack for relative path , get app0 and assuming it goes from there
+    for (auto& pair : m_mnt_pairs) {
+        if (pair.guest_path.starts_with("/app0")) {
+            std::replace(pair.host_path.begin(), pair.host_path.end(), '\\', '/');
+            return pair.host_path + guest_directory;
+        }
+    }
+    return "";
+}
+int HandleTable::createHandle() {
+    std::unique_lock lock{m_mutex};
+    auto* file = new File{};
+    file->isDirectory = false;
+    file->isOpened = false;
+
+    int existingFilesNum = m_files.size();
+    // TODO when i close a file m_files probably have a open pos , so we can fill this
+    m_files.push_back(file);
+
+    return existingFilesNum - 1;
+}
+void HandleTable::deleteHandle(int d) {
+    std::unique_lock lock{m_mutex};
+    delete m_files.at(d);
+    m_files[d] = nullptr;
+}
+File* HandleTable::getFile(int d) {
+    std::unique_lock lock{m_mutex};
+    return m_files.at(d);
+}
+File* HandleTable::getFile(const std::string& real_name) {
+    std::unique_lock lock{m_mutex};
+    for (auto* file : m_files) {
+        if (file != nullptr && file->m_real_name == real_name) {
+            return file;
+        }
+    }
+    return nullptr;
+}
+}  // namespace Core::FileSys

src/core/file_sys/fs.h

@@ -0,0 +1,45 @@
+#pragma once
+#include <mutex>
+#include <string>
+#include <vector>
+
+namespace Core::FileSys {
+
+class MntPoints {
+  public:
+    struct MntPair {
+        std::string host_path;
+        std::string guest_path;  // e.g /app0/
+    };
+
+    MntPoints() {}
+    virtual ~MntPoints() {}
+    void mount(const std::string& host_folder, const std::string& guest_folder);
+    void unmount(const std::string& path);
+    void unmountAll();
+    std::string getHostDirectory(const std::string& guest_directory);
+
+  private:
+    std::vector<MntPair> m_mnt_pairs;
+    std::mutex m_mutex;
+};
+
+struct File {
+    std::atomic_bool isOpened;
+    std::atomic_bool isDirectory;
+    std::string m_real_name;
+};
+class HandleTable {
+    HandleTable() {}
+    virtual ~HandleTable() {}
+    int createHandle();
+    void deleteHandle(int d);
+    File* getFile(int d);
+    File* getFile(const std::string& real_name);
+
+  private:
+    std::vector<File*> m_files;
+    std::mutex m_mutex;
+};
+
+}  // namespace Core::FileSys

src/core/hle/libraries/libkernel/file_system.cpp

@@ -12,7 +12,7 @@ int PS4_SYSV_ABI sceKernelOpen(const char* path, int flags, u16 mode) {
     return 0;
 }
 
-int PS4_SYSV_ABI open(const char* path, int flags, /* SceKernelMode*/ u16 mode) {
+int PS4_SYSV_ABI posix_open(const char* path, int flags, /* SceKernelMode*/ u16 mode) {
     LOG_INFO_IF(log_file_fs, "posix open redirect to sceKernelOpen\n");
     int result = sceKernelOpen(path, flags, mode);
     if (result < 0) {
@@ -23,7 +23,7 @@ int PS4_SYSV_ABI open(const char* path, int flags, /* SceKernelMode*/ u16 mode)
 
 void fileSystemSymbolsRegister(Loader::SymbolsResolver* sym) {
     LIB_FUNCTION("1G3lF1Gg1k8", "libkernel", 1, "libkernel", 1, 1, sceKernelOpen);
-    LIB_FUNCTION("wuCroIGjt2g", "libScePosix", 1, "libkernel", 1, 1, open);
+    LIB_FUNCTION("wuCroIGjt2g", "libScePosix", 1, "libkernel", 1, 1, posix_open);
 }
 
 } // namespace Core::Libraries::LibKernel

src/core/hle/libraries/libkernel/file_system.h

@@ -10,7 +10,7 @@ namespace Core::Libraries::LibKernel {
 
 int PS4_SYSV_ABI sceKernelOpen(const char *path, int flags, /* SceKernelMode*/ u16 mode);
 
-int PS4_SYSV_ABI open(const char *path, int flags, /* SceKernelMode*/ u16 mode);
+int PS4_SYSV_ABI posix_open(const char *path, int flags, /* SceKernelMode*/ u16 mode);
 
 void fileSystemSymbolsRegister(Loader::SymbolsResolver *sym);