<minix/safecopies>

diff --git a/include/minix/safecopies.h b/include/minix/safecopies.h
new file mode 100644 (file)
index 0000000..3a79cff
--- /dev/null
+++ b/include/minix/safecopies.h
@@ -0,0 +1,68 @@
+
+#ifndef _MINIX_SAFECOPIES_H
+#define _MINIX_SAFECOPIES_H 1
+
+#include <minix/sys_config.h>
+#include <sys/types.h>
+#include <stdint.h>
+
+typedef int32_t cp_grant_id_t;
+
+typedef struct {
+       int cp_flags;   /* CPF_* below */
+       union {
+               struct {
+                       /* CPF_DIRECT */
+                       endpoint_t      cp_who_to;      /* grantee */
+                       vir_bytes       cp_start;       /* memory */
+                       size_t          cp_len;         /* size in bytes */
+                       char            cp_reserved[8]; /* future use */
+               } cp_direct;
+               struct {
+                       /* CPF_INDIRECT */
+                       endpoint_t      cp_who_to;      /* grantee */
+                       endpoint_t      cp_who_from;    /* previous granter */
+                       cp_grant_id_t   cp_grant;       /* previous grant */
+                       char            cp_reserved[8];/* future use */
+               } cp_indirect;
+               struct {
+                       /* CPF_MAGIC */
+                       endpoint_t      cp_who_from;    /* granter */
+                       endpoint_t      cp_who_to;      /* grantee */
+                       vir_bytes       cp_start;       /* memory */
+                       size_t          cp_len;         /* size in bytes */
+                       char            cp_reserved[8]; /* future use */
+               } cp_magic;
+       } cp_u;
+       char cp_reserved[8];                            /* future use */
+} cp_grant_t;
+
+/* Invalid grant number. */
+#define GRANT_INVALID  -1
+#define GRANT_VALID(g) ((g) > GRANT_INVALID)
+
+/* Operations: any combination is ok. */
+#define CPF_READ       0x000001 /* Granted process may read. */
+#define CPF_WRITE      0x000002 /* Granted process may write. */
+
+/* Internal flags. */
+#define CPF_USED       0x000100 /* Grant slot in use. */
+#define CPF_DIRECT     0x000200 /* Grant from this process to another. */
+#define CPF_INDIRECT   0x000400 /* Grant from grant to another. */
+#define CPF_MAGIC      0x000800 /* Grant from any to any. */
+
+/* Prototypes for functions in libsys. */
+_PROTOTYPE( cp_grant_id_t cpf_grant_direct, (endpoint_t, vir_bytes, size_t, int));
+_PROTOTYPE( cp_grant_id_t cpf_grant_indirect, (endpoint_t, endpoint_t, cp_grant_id_t));
+_PROTOTYPE( cp_grant_id_t cpf_grant_magic, (endpoint_t, endpoint_t, vir_bytes, size_t, int));
+_PROTOTYPE( int cpf_revoke, (cp_grant_id_t grant_id));
+_PROTOTYPE( int cpf_preallocate, (cp_grant_t *, int));
+_PROTOTYPE( int cpf_lookup, (cp_grant_id_t g, endpoint_t *ep, endpoint_t *ep2));
+
+/* Set a process' grant table location and size (in-kernel only). */
+#define _K_SET_GRANT_TABLE(rp, ptr, entries)   \
+       priv(rp)->s_grant_table= (ptr);         \
+       priv(rp)->s_grant_entries= (entries);
+
+#endif /* _MINIX_SAFECOPIES_H */
+