generalization of syscalls

Common/std.h

@@ -10,21 +10,21 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#if COM_DEF_TARGET == COM_DEF_TARGET_LINUX
-#include <sys/syscall.h>
-
-static inline long com_std_syscall(long number, long arg1, long arg2,
-                                   long arg3) {
-  long ret;
-  __asm__ volatile("syscall"
-                   : "=a"(ret)
-                   : "a"(number), "D"(arg1), "S"(arg2), "d"(arg3)
-                   : "rcx", "r11", "memory");
-  return ret;
-}
-#endif
+/* Generic system interface, linux/bsd derived. */
+typedef void *com_std_fd;
+#define COM_STD_OPEN_READ (1 << 0)
+#define COM_STD_OPEN_WRITE (1 << 1)
+com_std_fd com_std_open(char *path, uint32_t flags);
+bool com_std_write(com_std_fd fd, char const *data, uint32_t bytes);
+int32_t com_std_read(com_std_fd fd, char *data, uint32_t upto);
+bool com_std_sfwd(com_std_fd fd, uint32_t bytes);
+com_std_fd com_std_socket(bool isnetwork);
+bool com_std_connect(com_std_fd sock, bool isnetwork, char *address);
+void com_std_exit(uint32_t status) __attribute__((noreturn));
+void com_std_close(com_std_fd fd);
 
 /* TODO: Remove, use buffer semantics instead. */
+/*       Instead have a mmap functions here. */
 /* Note: Freeing is done by passing 0 size to pointer. */
 void *com_std_alloc(void *ptr, size_t size);