[Xen-changelog] [xen-unstable] libxl: make libxl_ctx_free tolerate NULL ctx argument

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
# Date 1307036793 -3600
# Node ID 085575a5150e256647a5a069a45631823a9656c6
# Parent  a0a476860f2e49e346dd17d177aa99336b0b3ab4
libxl: make libxl_ctx_free tolerate NULL ctx argument

This is purely for convenience (eg, when debugging).

Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Committed-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---


diff -r a0a476860f2e -r 085575a5150e tools/libxl/libxl.c
--- a/tools/libxl/libxl.c       Thu Jun 02 18:46:32 2011 +0100
+++ b/tools/libxl/libxl.c       Thu Jun 02 18:46:33 2011 +0100
@@ -85,6 +85,7 @@
 
 int libxl_ctx_free(libxl_ctx *ctx)
 {
+    if (!ctx) return 0;
     if (ctx->xch) xc_interface_close(ctx->xch);
     libxl_version_info_destroy(&ctx->version_info);
     if (ctx->xsh) xs_daemon_close(ctx->xsh); 
diff -r a0a476860f2e -r 085575a5150e tools/libxl/libxl.h
--- a/tools/libxl/libxl.h       Thu Jun 02 18:46:32 2011 +0100
+++ b/tools/libxl/libxl.h       Thu Jun 02 18:46:33 2011 +0100
@@ -232,7 +232,7 @@
 
 /* context functions */
 int libxl_ctx_alloc(libxl_ctx **pctx, int version, xentoollog_logger *lg);
-int libxl_ctx_free(libxl_ctx *ctx);
+int libxl_ctx_free(libxl_ctx *ctx /* 0 is OK */);
 int libxl_ctx_postfork(libxl_ctx *ctx);
 
 /* domain related functions */

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