Refactor io utils, add *-address-rw tools

Namespace io_ stuff into mem_io_ to be less likely to collision with
anything else. Add io-stream utility for working with streams instead of
direct buffers. Add address-rw tools for simple memory read/write, where
regions aren't needed.

1 files changed, 30 insertions, 0 deletions

diff --git a/src/mem/io.h b/src/mem/io.h
new file mode 100644
index 0000000..665b0cd
--- /dev/null
+++ b/src/mem/io.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <sys/types.h> // pid_t
+
+struct mem_io {
+   size_t (*read)(const struct mem_io *io, void *ptr, const size_t offset, const size_t size);
+   size_t (*write)(const struct mem_io *io, const void *ptr, const size_t offset, const size_t size);
+   void (*cleanup)(struct mem_io *io);
+   void *backing;
+   pid_t pid;
+};
+
+static inline void
+mem_io_release(struct mem_io *io)
+{
+   if (io->cleanup)
+      io->cleanup(io);
+   *io = (struct mem_io){0};
+}
+
+void
+mem_io_release(struct mem_io *io);
+
+bool
+mem_io_uio_init(struct mem_io *io, const pid_t pid);
+
+bool
+mem_io_ptrace_init(struct mem_io *io, const pid_t pid);