[Qemu-devel] [PATCH 1/6] qemu-char: introduce qemu_chr_alloc

[Paolo Bonzini]

The next patch will modify this function to initialize state that is
common to all backends.

Signed-off-by: Paolo Bonzini <address@hidden>
---
 backends/baum.c       |  2 +-
 backends/msmouse.c    |  2 +-
 include/sysemu/char.h |  9 +++++++++
 qemu-char.c           | 32 +++++++++++++++++++-------------
 spice-qemu-char.c     |  2 +-
 ui/console.c          |  2 +-
 6 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/backends/baum.c b/backends/baum.c
index 759003f..796512d 100644
--- a/backends/baum.c
+++ b/backends/baum.c
@@ -574,7 +574,7 @@ CharDriverState *chr_baum_init(void)
     int tty;
 
     baum = g_malloc0(sizeof(BaumDriverState));
-    baum->chr = chr = g_malloc0(sizeof(CharDriverState));
+    baum->chr = chr = qemu_chr_alloc();
 
     chr->opaque = baum;
     chr->chr_write = baum_write;
diff --git a/backends/msmouse.c b/backends/msmouse.c
index c0dbfcd..650a531 100644
--- a/backends/msmouse.c
+++ b/backends/msmouse.c
@@ -67,7 +67,7 @@ CharDriverState *qemu_chr_open_msmouse(void)
 {
     CharDriverState *chr;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     chr->chr_write = msmouse_chr_write;
     chr->chr_close = msmouse_chr_close;
     chr->explicit_be_open = true;
diff --git a/include/sysemu/char.h b/include/sysemu/char.h
index b81a6ff..9bbfd06 100644
--- a/include/sysemu/char.h
+++ b/include/sysemu/char.h
@@ -85,6 +85,15 @@ struct CharDriverState {
 };
 
 /**
+ * @qemu_chr_alloc:
+ *
+ * Allocate and initialize a new CharDriverState.
+ *
+ * Returns: a newly allocated CharDriverState.
+ */
+CharDriverState *qemu_chr_alloc(void);
+
+/**
  * @qemu_chr_new_from_opts:
  *
  * Create a new character backend from a QemuOpts list.
diff --git a/qemu-char.c b/qemu-char.c
index 54ed244..3df5db7 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -91,6 +91,12 @@
 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
     QTAILQ_HEAD_INITIALIZER(chardevs);
 
+CharDriverState *qemu_chr_alloc(void)
+{
+    CharDriverState *chr = g_malloc0(sizeof(CharDriverState));
+    return chr;
+}
+
 void qemu_chr_be_event(CharDriverState *s, int event)
 {
     /* Keep track if the char device is open */
@@ -236,7 +242,7 @@ static CharDriverState *qemu_chr_open_null(void)
 {
     CharDriverState *chr;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     chr->chr_write = null_chr_write;
     chr->explicit_be_open = true;
     return chr;
@@ -524,7 +530,7 @@ static CharDriverState *qemu_chr_open_mux(CharDriverState 
*drv)
     CharDriverState *chr;
     MuxDriver *d;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     d = g_malloc0(sizeof(MuxDriver));
 
     chr->opaque = d;
@@ -899,7 +905,7 @@ static CharDriverState *qemu_chr_open_fd(int fd_in, int 
fd_out)
     CharDriverState *chr;
     FDCharDriver *s;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(FDCharDriver));
     s->fd_in = io_channel_from_fd(fd_in);
     s->fd_out = io_channel_from_fd(fd_out);
@@ -1176,7 +1182,7 @@ static CharDriverState *qemu_chr_open_pty(const char *id,
 
     close(slave_fd);
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
 
     chr->filename = g_strdup_printf("pty:%s", pty_name);
     ret->pty = g_strdup(pty_name);
@@ -1538,7 +1544,7 @@ static CharDriverState *qemu_chr_open_pp_fd(int fd)
     drv->fd = fd;
     drv->mode = IEEE1284_MODE_COMPAT;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     chr->chr_write = null_chr_write;
     chr->chr_ioctl = pp_ioctl;
     chr->chr_close = pp_close;
@@ -1593,7 +1599,7 @@ static CharDriverState *qemu_chr_open_pp_fd(int fd)
 {
     CharDriverState *chr;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     chr->opaque = (void *)(intptr_t)fd;
     chr->chr_write = null_chr_write;
     chr->chr_ioctl = pp_ioctl;
@@ -1817,7 +1823,7 @@ static CharDriverState *qemu_chr_open_win_path(const char 
*filename)
     CharDriverState *chr;
     WinCharState *s;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(WinCharState));
     chr->opaque = s;
     chr->chr_write = win_chr_write;
@@ -1916,7 +1922,7 @@ static CharDriverState *qemu_chr_open_pipe(ChardevHostdev 
*opts)
     CharDriverState *chr;
     WinCharState *s;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(WinCharState));
     chr->opaque = s;
     chr->chr_write = win_chr_write;
@@ -1935,7 +1941,7 @@ static CharDriverState *qemu_chr_open_win_file(HANDLE 
fd_out)
     CharDriverState *chr;
     WinCharState *s;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(WinCharState));
     s->hcom = fd_out;
     chr->opaque = s;
@@ -2091,7 +2097,7 @@ static CharDriverState *qemu_chr_open_stdio(ChardevStdio 
*opts)
     DWORD              dwMode;
     int                is_console = 0;
 
-    chr   = g_malloc0(sizeof(CharDriverState));
+    chr   = qemu_chr_alloc();
     stdio = g_malloc0(sizeof(WinStdioCharState));
 
     stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
@@ -2253,7 +2259,7 @@ static CharDriverState *qemu_chr_open_udp_fd(int fd)
     CharDriverState *chr = NULL;
     NetCharDriver *s = NULL;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(NetCharDriver));
 
     s->fd = fd;
@@ -2637,7 +2643,7 @@ static CharDriverState *qemu_chr_open_socket_fd(int fd, 
bool do_nodelay,
         return NULL;
     }
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(TCPCharDriver));
 
     s->connected = 0;
@@ -2822,7 +2828,7 @@ static CharDriverState 
*qemu_chr_open_ringbuf(ChardevRingbuf *opts,
     CharDriverState *chr;
     RingBufCharDriver *d;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     d = g_malloc(sizeof(*d));
 
     d->size = opts->has_size ? opts->size : 65536;
diff --git a/spice-qemu-char.c b/spice-qemu-char.c
index 6624559..4518a4d 100644
--- a/spice-qemu-char.c
+++ b/spice-qemu-char.c
@@ -268,7 +268,7 @@ static CharDriverState *chr_open(const char *subtype,
     CharDriverState *chr;
     SpiceCharDriver *s;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
     s = g_malloc0(sizeof(SpiceCharDriver));
     s->chr = chr;
     s->active = false;
diff --git a/ui/console.c b/ui/console.c
index e057755..c893b27 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1795,7 +1795,7 @@ static CharDriverState *text_console_init(ChardevVC *vc)
     unsigned width = 0;
     unsigned height = 0;
 
-    chr = g_malloc0(sizeof(CharDriverState));
+    chr = qemu_chr_alloc();
 
     if (vc->has_width) {
         width = vc->width;
-- 
1.8.3.1