a good deal of process

1 files changed, 43 insertions, 0 deletions

diff --git a/src/kernel/proc.c b/src/kernel/proc.c
new file mode 100644
index 0000000..dba6b92
--- /dev/null
+++ b/src/kernel/proc.c
@@ -0,0 +1,43 @@
+/*
+Copyright 2019 Benji Dial
+
+Permission to use, copy, modify, and/or distribute this
+software for any purpose with or without fee is hereby
+granted, provided that the above copyright notice and this
+permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS
+ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+OF THIS SOFTWARE.
+*/
+
+#include "proc.h"
+#include "mem.h"
+#include "files.h"
+
+uint16_t new_proc(uint8_t *file) {
+  uint16_t handle = open_file(file);
+  if (handle)
+    for (uint16_t id = 3; id; ++id)
+      if (!(PROCS[id].memory_start)) {
+        uint32_t size = get_size(id);
+        void *mem = PROCS[id].memory_start = allocate_pages(PROCS[id].n_pages = (size - 1) / 4096 + 1, id);
+        read_file(handle, size, mem);
+        close_file(handle);
+        //Process file header and make new process
+        return id;
+      }
+  close_file(handle);
+  return 0;
+}
+
+void end_proc(uint16_t id) {
+  deallocate_pages(PROCS[id].memory_start, PROCS[id].n_pages);
+  PROCS[id].memory_start = 0;
+}
\ No newline at end of file