xf86drmMode: constify drmModeAtomicReq functions

This acts as an additional ABI guarantee, and improves
documentation for users.

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.com>

diff --git a/xf86drmMode.c b/xf86drmMode.c
index 87e9660..6b79d76 100644 (file)
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -1348,7 +1348,7 @@ drm_public drmModeAtomicReqPtr drmModeAtomicAlloc(void)
        return req;
 }
 
-drm_public drmModeAtomicReqPtr drmModeAtomicDuplicate(drmModeAtomicReqPtr old)
+drm_public drmModeAtomicReqPtr drmModeAtomicDuplicate(const drmModeAtomicReqPtr old)
 {
        drmModeAtomicReqPtr new;
 
@@ -1378,7 +1378,7 @@ drm_public drmModeAtomicReqPtr drmModeAtomicDuplicate(drmModeAtomicReqPtr old)
 }
 
 drm_public int drmModeAtomicMerge(drmModeAtomicReqPtr base,
-                                  drmModeAtomicReqPtr augment)
+                                  const drmModeAtomicReqPtr augment)
 {
        uint32_t i;
 
@@ -1411,7 +1411,7 @@ drm_public int drmModeAtomicMerge(drmModeAtomicReqPtr base,
        return 0;
 }
 
-drm_public int drmModeAtomicGetCursor(drmModeAtomicReqPtr req)
+drm_public int drmModeAtomicGetCursor(const drmModeAtomicReqPtr req)
 {
        if (!req)
                return -EINVAL;
@@ -1480,7 +1480,7 @@ static int sort_req_list(const void *misc, const void *other)
                return first->cursor - second->cursor;
 }
 
-drm_public int drmModeAtomicCommit(int fd, drmModeAtomicReqPtr req,
+drm_public int drmModeAtomicCommit(int fd, const drmModeAtomicReqPtr req,
                                    uint32_t flags, void *user_data)
 {
        drmModeAtomicReqPtr sorted;

diff --git a/xf86drmMode.h b/xf86drmMode.h
index 19bf91d..0855764 100644 (file)
--- a/xf86drmMode.h
+++ b/xf86drmMode.h
@@ -433,18 +433,18 @@ extern int drmModeObjectSetProperty(int fd, uint32_t object_id,
 typedef struct _drmModeAtomicReq drmModeAtomicReq, *drmModeAtomicReqPtr;
 
 extern drmModeAtomicReqPtr drmModeAtomicAlloc(void);
-extern drmModeAtomicReqPtr drmModeAtomicDuplicate(drmModeAtomicReqPtr req);
+extern drmModeAtomicReqPtr drmModeAtomicDuplicate(const drmModeAtomicReqPtr req);
 extern int drmModeAtomicMerge(drmModeAtomicReqPtr base,
-                             drmModeAtomicReqPtr augment);
+                             const drmModeAtomicReqPtr augment);
 extern void drmModeAtomicFree(drmModeAtomicReqPtr req);
-extern int drmModeAtomicGetCursor(drmModeAtomicReqPtr req);
+extern int drmModeAtomicGetCursor(const drmModeAtomicReqPtr req);
 extern void drmModeAtomicSetCursor(drmModeAtomicReqPtr req, int cursor);
 extern int drmModeAtomicAddProperty(drmModeAtomicReqPtr req,
                                    uint32_t object_id,
                                    uint32_t property_id,
                                    uint64_t value);
 extern int drmModeAtomicCommit(int fd,
-                              drmModeAtomicReqPtr req,
+                              const drmModeAtomicReqPtr req,
                               uint32_t flags,
                               void *user_data);