Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/wasi-c/sandboxed-system-primitives/src/posix.h

@@ -0,0 +1,59 @@
+// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
+//
+// Significant parts of this file are derived from cloudabi-utils. See
+// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
+// for license information.
+//
+// The upstream file contains the following copyright notice:
+//
+// Copyright (c) 2016-2018 Nuxi, https://nuxi.nl/
+
+#ifndef POSIX_H
+#define POSIX_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "locking.h"
+
+struct fd_entry;
+struct fd_prestat;
+struct syscalls;
+
+struct fd_table {
+  struct rwlock lock;
+  struct fd_entry *entries;
+  size_t size;
+  size_t used;
+};
+
+struct fd_prestats {
+  struct rwlock lock;
+  struct fd_prestat *prestats;
+  size_t size;
+  size_t used;
+};
+
+struct argv_environ_values {
+  size_t argc;
+  size_t argv_buf_size;
+  char **argv;
+  char *argv_buf;
+  size_t environ_count;
+  size_t environ_buf_size;
+  char **environ;
+  char *environ_buf;
+};
+
+void fd_table_init(struct fd_table *);
+bool fd_table_insert_existing(struct fd_table *, __wasi_fd_t, int);
+void fd_prestats_init(struct fd_prestats *);
+bool fd_prestats_insert(struct fd_prestats *, const char *, __wasi_fd_t);
+void argv_environ_init(struct argv_environ_values *,
+                       const size_t *argv_offsets, size_t argv_offsets_len,
+                       const char *argv_buf, size_t argv_buf_len,
+                       const size_t *environ_offsets, size_t environ_offsets_len,
+                       const char *environ_buf, size_t environ_buf_len);
+
+#endif