[Xen-changelog] [xen stable-4.5] libxl: poll: Use poller_get and poller_put for poller_app

[patchbot@xxxxxxx]

commit 9f6f513eecbdc76ce30b5f2e6c52e02076bac30b
Author:     Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
AuthorDate: Thu Jul 9 17:05:07 2015 +0100
Commit:     Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CommitDate: Wed Aug 12 12:39:57 2015 +0100

    libxl: poll: Use poller_get and poller_put for poller_app
    
    This makes the code more regular.  We are going to want to do some
    more work in poller_get and poller_put, which work also wants to be
    done for poller_app.
    
    Two very minor functional changes:
    
     * We call malloc an extra time since poller_app is now a pointer
    
     * ERROR_FAIL on poller_get failing for poller_app is generated in
       libxl_ctx_init rather than passed through by libxl_poller_init
       from libxl__pipe_nonblock.
    
    Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
    CC: Jim Fehlig <jfehlig@xxxxxxxx>
    Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Tested-by: Jim Fehlig <jfehlig@xxxxxxxx>
    (cherry picked from commit aae37652067eafd0f2b85050306772df0cb71f08)
---
 tools/libxl/libxl.c          |   11 ++++++++---
 tools/libxl/libxl_event.c    |    4 ++--
 tools/libxl/libxl_internal.h |    2 +-
 3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 489d5f8..939e077 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -59,6 +59,7 @@ int libxl_ctx_alloc(libxl_ctx **pctx, int version,
 
     ctx->osevent_hooks = 0;
 
+    ctx->poller_app = 0;
     LIBXL_LIST_INIT(&ctx->pollers_event);
     LIBXL_LIST_INIT(&ctx->pollers_idle);
 
@@ -101,8 +102,11 @@ int libxl_ctx_alloc(libxl_ctx **pctx, int version,
     rc = libxl__atfork_init(ctx);
     if (rc) goto out;
 
-    rc = libxl__poller_init(gc, &ctx->poller_app);
-    if (rc) goto out;
+    ctx->poller_app = libxl__poller_get(gc);
+    if (!ctx->poller_app) {
+        rc = ERROR_FAIL;
+        goto out;
+    }
 
     ctx->xch = xc_interface_open(lg,lg,0);
     if (!ctx->xch) {
@@ -178,7 +182,8 @@ int libxl_ctx_free(libxl_ctx *ctx)
     if (ctx->xsh) xs_daemon_close(ctx->xsh);
     if (ctx->xce) xc_evtchn_close(ctx->xce);
 
-    libxl__poller_dispose(&ctx->poller_app);
+    libxl__poller_put(ctx, ctx->poller_app);
+    ctx->poller_app = NULL;
     assert(LIBXL_LIST_EMPTY(&ctx->pollers_event));
     libxl__poller *poller, *poller_tmp;
     LIBXL_LIST_FOREACH_SAFE(poller, &ctx->pollers_idle, entry, poller_tmp) {
diff --git a/tools/libxl/libxl_event.c b/tools/libxl/libxl_event.c
index de7c67f..06ad284 100644
--- a/tools/libxl/libxl_event.c
+++ b/tools/libxl/libxl_event.c
@@ -1059,7 +1059,7 @@ int libxl_osevent_beforepoll(libxl_ctx *ctx, int *nfds_io,
 {
     EGC_INIT(ctx);
     CTX_LOCK;
-    int rc = beforepoll_internal(gc, &ctx->poller_app,
+    int rc = beforepoll_internal(gc, ctx->poller_app,
                                  nfds_io, fds, timeout_upd, now);
     CTX_UNLOCK;
     EGC_FREE;
@@ -1204,7 +1204,7 @@ void libxl_osevent_afterpoll(libxl_ctx *ctx, int nfds, 
const struct pollfd *fds,
 {
     EGC_INIT(ctx);
     CTX_LOCK;
-    afterpoll_internal(egc, &ctx->poller_app, nfds, fds, now);
+    afterpoll_internal(egc, ctx->poller_app, nfds, fds, now);
     CTX_UNLOCK;
     EGC_FREE;
 }
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index a1624fd..4120feb 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -343,7 +343,7 @@ struct libxl__ctx {
       /* See the comment for OSEVENT_HOOK_INTERN in libxl_event.c
        * for restrictions on the use of the osevent fields. */
 
-    libxl__poller poller_app; /* libxl_osevent_beforepoll and _afterpoll */
+    libxl__poller *poller_app; /* libxl_osevent_beforepoll and _afterpoll */
     LIBXL_LIST_HEAD(, libxl__poller) pollers_event, pollers_idle;
 
     LIBXL_SLIST_HEAD(libxl__osevent_hook_nexi, libxl__osevent_hook_nexus)
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.5

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