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[Qemu-devel] [PATCH v2 8/9] qga/command: use QEMU atomic primitives
From: |
Alex Bennée |
Subject: |
[Qemu-devel] [PATCH v2 8/9] qga/command: use QEMU atomic primitives |
Date: |
Thu, 22 Sep 2016 11:13:15 +0100 |
The guest client's use of the glib's g_atomic primitives causes newer
GCC's to barf when built on Travis. As QEMU has its own primitives with
well understood semantics we might as well use them.
The use of atomics was a little inconsistent so I've also ensure the
values are correctly set with atomic primitives at the same time.
I also made the usage of bool consistent while I was at it.
Signed-off-by: Alex Bennée <address@hidden>
---
qga/commands.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/qga/commands.c b/qga/commands.c
index 50fd26a..edd3e83 100644
--- a/qga/commands.c
+++ b/qga/commands.c
@@ -16,6 +16,7 @@
#include "qapi/qmp/qerror.h"
#include "qemu/base64.h"
#include "qemu/cutils.h"
+#include "qemu/atomic.h"
/* Maximum captured guest-exec out_data/err_data - 16MB */
#define GUEST_EXEC_MAX_OUTPUT (16*1024*1024)
@@ -82,7 +83,7 @@ struct GuestExecIOData {
guchar *data;
gsize size;
gsize length;
- gint closed;
+ bool closed;
bool truncated;
const char *name;
};
@@ -93,7 +94,7 @@ struct GuestExecInfo {
int64_t pid_numeric;
gint status;
bool has_output;
- gint finished;
+ bool finished;
GuestExecIOData in;
GuestExecIOData out;
GuestExecIOData err;
@@ -156,13 +157,13 @@ GuestExecStatus *qmp_guest_exec_status(int64_t pid, Error
**err)
ges = g_new0(GuestExecStatus, 1);
- bool finished = g_atomic_int_get(&gei->finished);
+ bool finished = atomic_mb_read(&gei->finished);
/* need to wait till output channels are closed
* to be sure we captured all output at this point */
if (gei->has_output) {
- finished = finished && g_atomic_int_get(&gei->out.closed);
- finished = finished && g_atomic_int_get(&gei->err.closed);
+ finished = finished && atomic_mb_read(&gei->out.closed);
+ finished = finished && atomic_mb_read(&gei->err.closed);
}
ges->exited = finished;
@@ -264,7 +265,7 @@ static void guest_exec_child_watch(GPid pid, gint status,
gpointer data)
(int32_t)gpid_to_int64(pid), (uint32_t)status);
gei->status = status;
- gei->finished = true;
+ atomic_mb_set(&gei->finished, true);
g_spawn_close_pid(pid);
}
@@ -320,7 +321,7 @@ static gboolean guest_exec_input_watch(GIOChannel *ch,
done:
g_io_channel_shutdown(ch, true, NULL);
g_io_channel_unref(ch);
- g_atomic_int_set(&p->closed, 1);
+ atomic_mb_set(&p->closed, true);
g_free(p->data);
return false;
@@ -374,7 +375,7 @@ static gboolean guest_exec_output_watch(GIOChannel *ch,
close:
g_io_channel_shutdown(ch, true, NULL);
g_io_channel_unref(ch);
- g_atomic_int_set(&p->closed, 1);
+ atomic_mb_set(&p->closed, true);
return false;
}
--
2.9.3
- [Qemu-devel] [PATCH v2 2/9] tcg/optimize: move default return out of if statement, (continued)
- [Qemu-devel] [PATCH v2 2/9] tcg/optimize: move default return out of if statement, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 1/9] ui/vnc-enc-tight: remove switch and have single return, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 4/9] seqlock: use atomic writes for the sequence, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 6/9] cpu: atomically modify cpu->exit_request, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 3/9] new: blacklist.tsan, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 8/9] qga/command: use QEMU atomic primitives,
Alex Bennée <=
- [Qemu-devel] [PATCH v2 5/9] qom/object: update class cache atomically, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 9/9] .travis.yml: add gcc sanitizer build, Alex Bennée, 2016/09/22
- [Qemu-devel] [PATCH v2 7/9] util/qht: atomically set b->hashes, Alex Bennée, 2016/09/22
- Re: [Qemu-devel] [PATCH v2 0/9] A couple of fixes for ThreadSanitizer, Paolo Bonzini, 2016/09/30