vfs: Use C ABI for callbacks

Fixes #40.

1 files changed, 10 insertions, 10 deletions

diff --git a/src/lib/vfs.zig b/src/lib/vfs.zig
index 22cba72..dc5194c 100644
--- a/src/lib/vfs.zig
+++ b/src/lib/vfs.zig
@@ -26,8 +26,8 @@ pub const Stream = struct {
     readFn: ?ReadFn,
     writeFn: ?WriteFn,
 
-    pub const ReadFn = *const fn (buffer: []u8) sysexchange.Result(usize);
-    pub const WriteFn = *const fn (bytes: []const u8) sysexchange.Result(usize);
+    pub const ReadFn = *const fn (ptr: [*]u8, len: usize) callconv(.C) sysexchange.Result(usize);
+    pub const WriteFn = *const fn (ptr: [*]const u8, len: usize) callconv(.C) sysexchange.Result(usize);
 };
 
 // A file is a resource that creates a unique data stream with a driver.
@@ -37,10 +37,10 @@ pub const File = struct {
     writeFn: ?WriteFn,
     closeFn: ?CloseFn,
 
-    pub const OpenFn = *allowzero const fn (pid: u16) sysexchange.Result(*anyopaque);
-    pub const ReadFn = *const fn (context: *anyopaque, buffer: []u8) sysexchange.Result(usize);
-    pub const WriteFn = *const fn (context: *anyopaque, bytes: []const u8) sysexchange.Result(usize);
-    pub const CloseFn = *const fn (context: *anyopaque) void;
+    pub const OpenFn = *allowzero const fn (pid: u16) callconv(.C) sysexchange.Result(*anyopaque);
+    pub const ReadFn = *const fn (context: *anyopaque, ptr: [*]u8, len: usize) callconv(.C) sysexchange.Result(usize);
+    pub const WriteFn = *const fn (context: *anyopaque, ptr: [*]const u8, len: usize) callconv(.C) sysexchange.Result(usize);
+    pub const CloseFn = *const fn (context: *anyopaque) callconv(.C) void;
 };
 
 // A hook is a resource that invokes raw driver callbacks when interacted with.
@@ -62,8 +62,8 @@ pub const DirHook = struct {
     removeFn: RemoveFn,
 
     pub const ProvideFn = *allowzero const fn (inode: Inode) sysexchange.Result(void);
-    pub const FindFn = *allowzero const fn (name: []const u8) ?Inode;
-    pub const RemoveFn = *allowzero const fn (name: []const u8) sysexchange.Result(void);
+    pub const FindFn = *allowzero const fn (name: [*:0]const u8) ?Inode;
+    pub const RemoveFn = *allowzero const fn (name: [*:0]const u8) sysexchange.Result(void);
 };
 
 pub const Resource = union(enum) {
@@ -137,7 +137,7 @@ pub const ResourceDescriptor = struct {
             .stream => |stream| {
                 const readFn = stream.readFn orelse return Error.ReadNotSupported;
                 proc.state = .suspended;
-                try call(self.inode.pid, readFn, .{buffer}, .{
+                try call(self.inode.pid, readFn, .{ buffer.ptr, buffer.len }, .{
                     .hookFn = crossProcessReturn,
                     .context = proc,
                 });
@@ -152,7 +152,7 @@ pub const ResourceDescriptor = struct {
             .stream => |stream| {
                 const writeFn = stream.writeFn orelse return Error.WriteNotSupported;
                 proc.state = .suspended;
-                try call(self.inode.pid, writeFn, .{bytes}, .{
+                try call(self.inode.pid, writeFn, .{ bytes.ptr, bytes.len }, .{
                     .hookFn = crossProcessReturn,
                     .context = proc,
                 });