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Re: [PATCH 02/20] monitor: Use GString instead of QString for output buf
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [PATCH 02/20] monitor: Use GString instead of QString for output buffer |
Date: |
Wed, 16 Dec 2020 19:36:50 +0000 |
User-agent: |
Mutt/1.14.6 (2020-07-11) |
* Markus Armbruster (armbru@redhat.com) wrote:
> GString has a richer set of string operations than QString. It should
> be preferred to QString except where we need a QObject or reference
> counting. We don't here. Switch to GString, and put its richer
> interface to use.
>
> Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> monitor/monitor-internal.h | 2 +-
> monitor/misc.c | 2 +-
> monitor/monitor.c | 20 ++++++++------------
> 3 files changed, 10 insertions(+), 14 deletions(-)
>
> diff --git a/monitor/monitor-internal.h b/monitor/monitor-internal.h
> index a6131554da..40903d6386 100644
> --- a/monitor/monitor-internal.h
> +++ b/monitor/monitor-internal.h
> @@ -105,7 +105,7 @@ struct Monitor {
> * Members that are protected by the per-monitor lock
> */
> QLIST_HEAD(, mon_fd_t) fds;
> - QString *outbuf;
> + GString *outbuf;
> guint out_watch;
> /* Read under either BQL or mon_lock, written with BQL+mon_lock. */
> int mux_out;
> diff --git a/monitor/misc.c b/monitor/misc.c
> index 6c3e8506a9..814d22de11 100644
> --- a/monitor/misc.c
> +++ b/monitor/misc.c
> @@ -136,7 +136,7 @@ char *qmp_human_monitor_command(const char *command_line,
> bool has_cpu_index,
> handle_hmp_command(&hmp, command_line);
>
> WITH_QEMU_LOCK_GUARD(&hmp.common.mon_lock) {
> - output = g_strdup(qstring_get_str(hmp.common.outbuf));
> + output = g_strdup(hmp.common.outbuf->str);
> }
>
> out:
> diff --git a/monitor/monitor.c b/monitor/monitor.c
> index 84222cd130..1e4a6b3f20 100644
> --- a/monitor/monitor.c
> +++ b/monitor/monitor.c
> @@ -29,7 +29,6 @@
> #include "qapi/qapi-emit-events.h"
> #include "qapi/qapi-visit-control.h"
> #include "qapi/qmp/qdict.h"
> -#include "qapi/qmp/qstring.h"
> #include "qemu/error-report.h"
> #include "qemu/option.h"
> #include "sysemu/qtest.h"
> @@ -181,22 +180,19 @@ static void monitor_flush_locked(Monitor *mon)
> return;
> }
>
> - buf = qstring_get_str(mon->outbuf);
> - len = qstring_get_length(mon->outbuf);
> + buf = mon->outbuf->str;
> + len = mon->outbuf->len;
>
> if (len && !mon->mux_out) {
> rc = qemu_chr_fe_write(&mon->chr, (const uint8_t *) buf, len);
> if ((rc < 0 && errno != EAGAIN) || (rc == len)) {
> /* all flushed or error */
> - qobject_unref(mon->outbuf);
> - mon->outbuf = qstring_new();
> + g_string_truncate(mon->outbuf, 0);
> return;
> }
> if (rc > 0) {
> /* partial write */
> - QString *tmp = qstring_from_str(buf + rc);
> - qobject_unref(mon->outbuf);
> - mon->outbuf = tmp;
> + g_string_erase(mon->outbuf, 0, rc);
> }
> if (mon->out_watch == 0) {
> mon->out_watch =
> @@ -223,9 +219,9 @@ int monitor_puts(Monitor *mon, const char *str)
> for (i = 0; str[i]; i++) {
> c = str[i];
> if (c == '\n') {
> - qstring_append_chr(mon->outbuf, '\r');
> + g_string_append_c(mon->outbuf, '\r');
> }
> - qstring_append_chr(mon->outbuf, c);
> + g_string_append_c(mon->outbuf, c);
> if (c == '\n') {
> monitor_flush_locked(mon);
> }
> @@ -602,7 +598,7 @@ void monitor_data_init(Monitor *mon, bool is_qmp, bool
> skip_flush,
> }
> qemu_mutex_init(&mon->mon_lock);
> mon->is_qmp = is_qmp;
> - mon->outbuf = qstring_new();
> + mon->outbuf = g_string_new(NULL);
> mon->skip_flush = skip_flush;
> mon->use_io_thread = use_io_thread;
> }
> @@ -616,7 +612,7 @@ void monitor_data_destroy(Monitor *mon)
> } else {
> readline_free(container_of(mon, MonitorHMP, common)->rs);
> }
> - qobject_unref(mon->outbuf);
> + g_string_free(mon->outbuf, true);
> qemu_mutex_destroy(&mon->mon_lock);
> }
>
> --
> 2.26.2
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
- [PATCH 00/20] Immutable QString, and also one JSON writer less, Markus Armbruster, 2020/12/11
- [PATCH 02/20] monitor: Use GString instead of QString for output buffer, Markus Armbruster, 2020/12/11
- Re: [PATCH 02/20] monitor: Use GString instead of QString for output buffer,
Dr. David Alan Gilbert <=
- [PATCH 04/20] qobject: Use GString instead of QString to accumulate JSON, Markus Armbruster, 2020/12/11
- [PATCH 14/20] qobject: Factor quoted_str() out of to_json(), Markus Armbruster, 2020/12/11
- [PATCH 08/20] qobject: Move internals to qobject-internal.h, Markus Armbruster, 2020/12/11
- [PATCH 05/20] qobject: Change qobject_to_json()'s value to GString, Markus Armbruster, 2020/12/11
- [PATCH 06/20] Revert "qstring: add qstring_free()", Markus Armbruster, 2020/12/11
- [PATCH 12/20] qobject: Drop qobject_get_try_str(), Markus Armbruster, 2020/12/11
- [PATCH 19/20] block: Use GString instead of QString to build filenames, Markus Armbruster, 2020/12/11
- [PATCH 09/20] qmp: Fix tracing of non-string command IDs, Markus Armbruster, 2020/12/11
- [PATCH 03/20] qobject: Make qobject_to_json_pretty() take a pretty argument, Markus Armbruster, 2020/12/11