progress on volatileFilesystem and fixed a file descriptor leak

build.zig

@@ -28,6 +28,7 @@ fn addEngineSources(b: *std.Build, opts: LibBuildOpts) *std.Build.Module {
             "src/components/eeprom.c",
             "src/components/volatileEeprom.c",
             "src/components/filesystem.c",
+            "src/components/volatileFilesystem.c",
             "src/components/drive.c",
             "src/components/volatileDrive.c",
             "src/components/screen.c",

src/components/filesystem.c

@@ -46,6 +46,12 @@ void nn_retainFilesystem(nn_filesystem *fs) {
 
 nn_bool_t nn_destroyFilesystem(nn_filesystem *fs) {
     if(!nn_decRef(&fs->refc)) return false;
+    
+    // close all files
+    for(size_t i = 0; i < NN_MAX_OPEN_FILES; i++) {
+        void *f = fs->files[i];
+        if(f != NULL) fs->table.close(fs->table.userdata, f);
+    }
 
     if(fs->table.deinit != NULL) {
         fs->table.deinit(fs->table.userdata);

src/components/volatileFilesystem.c

@@ -0,0 +1,41 @@
+#include "../neonucleus.h"
+
+typedef struct nn_vfnode {
+    struct nn_vfilesystem *fs;
+    struct nn_vfnode *parent;
+    char name[NN_MAX_PATH];
+    nn_bool_t isDirectory;
+    union {
+        // if directory
+        struct nn_vfnode **entries;
+        // if file
+        char *data;
+    };
+    nn_size_t len;
+    nn_size_t cap;
+    // this is used to block deleting
+    nn_refc handleCount;
+} nn_vfnode;
+
+typedef enum nn_vfmode {
+    NN_VFMODE_READ,
+    NN_VFMODE_WRITE,
+    NN_VFMODE_APPEND,
+} nn_vfmode;
+
+typedef struct nn_vfhandle {
+    nn_vfnode *node;
+    nn_size_t position;
+    nn_vfmode mode;
+} nn_vfhandle;
+
+typedef struct nn_vfilesystem {
+    nn_Context ctx;
+    nn_vfilesystemOptions opts;
+    double birthday;
+    nn_vfnode *root;
+} nn_vfilesystem;
+
+nn_filesystem *nn_volatileFilesystem(nn_Context *context, nn_vfilesystemOptions opts, nn_filesystemControl control) {
+
+}

src/neonucleus.h

@@ -117,6 +117,7 @@ extern "C" {
 #define NN_MAX_SIGNAL_SIZE 8192
 #define NN_MAX_OPEN_FILES 128
 #define NN_MAX_SCREEN_KEYBOARDS 64
+#define NN_MAX_PATH 256
 
 #define NN_OVERHEAT_MIN 100
 #define NN_CALL_HEAT 0.05
@@ -656,7 +657,6 @@ typedef struct nn_filesystemTable {
     void *userdata;
     void (*deinit)(void *userdata);
 
-    nn_filesystemControl (*control)(void *userdata);
     void (*getLabel)(void *userdata, char *buf, nn_size_t *buflen);
     nn_size_t (*setLabel)(void *userdata, const char *buf, nn_size_t buflen);
 
@@ -692,7 +692,18 @@ typedef struct nn_filesystemTable {
 
 typedef struct nn_filesystem nn_filesystem;
 
+typedef struct nn_vfilesystemOptions {
+    // used to compute lastModified
+    nn_size_t creationTime;
+    nn_size_t maxDirEntries;
+    nn_size_t capacity;
+    nn_bool_t isReadOnly;
+    char label[NN_LABEL_SIZE];
+    nn_size_t labelLen;
+} nn_vfilesystemOptions;
+
 nn_filesystem *nn_newFilesystem(nn_Context *context, nn_filesystemTable table, nn_filesystemControl control);
+nn_filesystem *nn_volatileFilesystem(nn_Context *context, nn_vfilesystemOptions opts, nn_filesystemControl control);
 nn_guard *nn_getFilesystemLock(nn_filesystem *fs);
 void nn_retainFilesystem(nn_filesystem *fs);
 nn_bool_t nn_destroyFilesystem(nn_filesystem *fs);