optimize imports (#170)

lib/emscripten/src/env/unix/mod.rs

@@ -1,15 +1,14 @@
 /// NOTE: These syscalls only support wasm_32 for now because they take u32 offset
 use libc::{
-    c_int, c_long, getenv, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam, putenv, setenv,
+    c_int, getenv, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam, putenv, setenv, sysconf,
-    sysconf, unsetenv,
+    unsetenv,
 };
 use std::ffi::CStr;
 use std::mem;
 use std::os::raw::c_char;
 
 use crate::env::call_malloc;
-use crate::utils::{allocate_on_stack, copy_cstr_into_wasm, copy_terminated_array_of_cstrs};
+use crate::utils::{copy_cstr_into_wasm, copy_terminated_array_of_cstrs};
-use crate::EmscriptenData;
 use wasmer_runtime_core::vm::Ctx;
 
 // #[no_mangle]

lib/emscripten/src/lib.rs

@@ -1,29 +1,20 @@
 #[macro_use]
 extern crate wasmer_runtime_core;
 
-use byteorder::{ByteOrder, LittleEndian};
-use libc::c_int;
 use std::cell::UnsafeCell;
-use std::{f64, ffi::c_void, fmt, mem, ptr};
+use std::{f64, ffi::c_void};
 use wasmer_runtime_core::{
     error::CallResult,
-    export::{Context, Export, FuncPointer},
+    export::Export,
     func,
     global::Global,
-    import::{ImportObject, Namespace},
+    import::ImportObject,
     imports,
     memory::Memory,
     table::Table,
-    types::{
+    types::{ElementType, MemoryDescriptor, TableDescriptor, Value},
-        ElementType, FuncSig, GlobalDescriptor, MemoryDescriptor, TableDescriptor,
-        Type::{self, *},
-        Value,
-    },
     units::Pages,
     vm::Ctx,
-    vm::LocalGlobal,
-    vm::LocalMemory,
-    vm::LocalTable,
     Func, Instance, Module,
 };
 

lib/emscripten/src/stdio.rs

@@ -12,7 +12,7 @@ pub struct StdioCapturer {
 }
 
 #[cfg(not(target_os = "windows"))]
-use libc::{STDERR_FILENO, STDIN_FILENO, STDOUT_FILENO};
+use libc::{STDERR_FILENO, STDOUT_FILENO};
 
 #[cfg(target_os = "windows")]
 const STDIN_FILENO: libc::c_int = 0;

lib/emscripten/src/syscalls/mod.rs

@@ -16,48 +16,30 @@ use byteorder::{ByteOrder, LittleEndian};
 /// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
 /// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
 use libc::{
-    accept,
-    bind,
     // ENOTTY,
-    c_char,
     c_int,
     c_void,
     chdir,
     // fcntl, setsockopt, getppid
     close,
-    connect,
     dup2,
     exit,
     fstat,
-    getpeername,
     getpid,
-    getsockname,
-    getsockopt,
     // iovec,
-    listen,
     lseek,
-    mkdir,
-    off_t,
     open,
     read,
     // readv,
-    recvfrom,
     rmdir,
     // writev,
-    sendto,
-    setsockopt,
-    sockaddr,
-    socket,
-    ssize_t,
     stat,
     write,
-    EINVAL,
     // sockaddr_in,
 };
 use wasmer_runtime_core::vm::Ctx;
 
 use super::env;
-use std::mem;
 use std::slice;
 // use std::sys::fd::FileDesc;
 

lib/emscripten/src/syscalls/unix.rs

@@ -1,5 +1,4 @@
 use crate::varargs::VarArgs;
-use byteorder::{ByteOrder, LittleEndian};
 /// NOTE: TODO: These syscalls only support wasm_32 for now because they assume offsets are u32
 /// Syscall list: https://www.cs.utexas.edu/~bismith/test/syscalls/syscalls32.html
 use libc::{
@@ -9,39 +8,28 @@ use libc::{
     c_char,
     c_int,
     c_void,
-    chdir,
     chown,
     // fcntl, setsockopt, getppid
-    close,
     connect,
     dup2,
-    exit,
     fcntl,
-    fstat,
     getgid,
     getpeername,
-    getpid,
     getsockname,
     getsockopt,
-    gid_t,
     in_addr_t,
     in_port_t,
     ioctl,
     // iovec,
     listen,
-    lseek,
     mkdir,
     msghdr,
-    off_t,
-    open,
     pid_t,
     pread,
     pwrite,
-    read,
     // readv,
     recvfrom,
     recvmsg,
-    rmdir,
     // ENOTTY,
     rusage,
     sa_family_t,
@@ -54,11 +42,8 @@ use libc::{
     sockaddr,
     socket,
     socklen_t,
-    ssize_t,
-    stat,
     uname,
     utsname,
-    write,
     EINVAL,
     // sockaddr_in,
     FIOCLEX,
@@ -71,9 +56,7 @@ use libc::{
 };
 use wasmer_runtime_core::vm::Ctx;
 
-use super::env;
 use std::mem;
-use std::slice;
 
 // Linking to functions that are not provided by rust libc
 #[cfg(target_os = "macos")]

lib/emscripten/src/time.rs

@@ -1,11 +1,14 @@
 use super::utils::{copy_cstr_into_wasm, write_to_buf};
-use libc::{c_char, c_int, time_t};
+use libc::{c_char, c_int};
 use std::mem;
 use std::time::SystemTime;
 
 #[cfg(not(target_os = "windows"))]
 use libc::{clockid_t, time as libc_time};
 
+#[cfg(target_os = "windows")]
+use libc::time_t;
+
 #[cfg(target_os = "windows")]
 type clockid_t = c_int;
 

lib/emscripten/src/utils.rs

@@ -2,10 +2,8 @@ use super::env;
 use super::env::get_emscripten_data;
 use libc::stat;
 use std::ffi::CStr;
-use std::ffi::CString;
 use std::mem::size_of;
 use std::os::raw::c_char;
-use std::os::raw::c_int;
 use std::slice;
 use wasmer_runtime_core::memory::Memory;
 use wasmer_runtime_core::{