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/*
* GLIB Compatibility Functions
*
* Copyright IBM, Corp. 2013
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Michael Tokarev <mjt@tls.msk.ru>
* Paolo Bonzini <pbonzini@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef QEMU_GLIB_COMPAT_H
#define QEMU_GLIB_COMPAT_H
/* Ask for warnings for anything that was marked deprecated in
* the defined version, or before. It is a candidate for rewrite.
*/
#define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_40
/* Ask for warnings if code tries to use function that did not
* exist in the defined version. These risk breaking builds
*/
#define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_40
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#include <glib.h>
/*
* Note that because of the GLIB_VERSION_MAX_ALLOWED constant above, allowing
* use of functions from newer GLib via this compat header needs a little
* trickery to prevent warnings being emitted.
*
* Consider a function from newer glib-X.Y that we want to use
*
* int g_foo(const char *wibble)
*
* We must define a static inline function with the same signature that does
* what we need, but with a "_qemu" suffix e.g.
*
* static inline void g_foo_qemu(const char *wibble)
* {
* #if GLIB_CHECK_VERSION(X, Y, 0)
* g_foo(wibble)
* #else
* g_something_equivalent_in_older_glib(wibble);
* #endif
* }
*
* The #pragma at the top of this file turns off -Wdeprecated-declarations,
* ensuring this wrapper function impl doesn't trigger the compiler warning
* about using too new glib APIs. Finally we can do
*
* #define g_foo(a) g_foo_qemu(a)
*
* So now the code elsewhere in QEMU, which *does* have the
* -Wdeprecated-declarations warning active, can call g_foo(...) as normal,
* without generating warnings.
*/
static inline gboolean g_strv_contains_qemu(const gchar *const *strv,
const gchar *str)
{
#if GLIB_CHECK_VERSION(2, 44, 0)
return g_strv_contains(strv, str);
#else
g_return_val_if_fail(strv != NULL, FALSE);
g_return_val_if_fail(str != NULL, FALSE);
for (; *strv != NULL; strv++) {
if (g_str_equal(str, *strv)) {
return TRUE;
}
}
return FALSE;
#endif
}
#define g_strv_contains(a, b) g_strv_contains_qemu(a, b)
#if !GLIB_CHECK_VERSION(2, 58, 0)
typedef struct QemuGSpawnFds {
GSpawnChildSetupFunc child_setup;
gpointer user_data;
gint stdin_fd;
gint stdout_fd;
gint stderr_fd;
} QemuGSpawnFds;
static inline void
qemu_gspawn_fds_setup(gpointer user_data)
{
QemuGSpawnFds *q = (QemuGSpawnFds *)user_data;
dup2(q->stdin_fd, 0);
dup2(q->stdout_fd, 1);
dup2(q->stderr_fd, 2);
q->child_setup(q->user_data);
}
#endif
static inline gboolean
g_spawn_async_with_fds_qemu(const gchar *working_directory,
gchar **argv,
gchar **envp,
GSpawnFlags flags,
GSpawnChildSetupFunc child_setup,
gpointer user_data,
GPid *child_pid,
gint stdin_fd,
gint stdout_fd,
gint stderr_fd,
GError **error)
{
#if GLIB_CHECK_VERSION(2, 58, 0)
return g_spawn_async_with_fds(working_directory, argv, envp, flags,
child_setup, user_data,
child_pid, stdin_fd, stdout_fd, stderr_fd,
error);
#else
QemuGSpawnFds setup = {
.child_setup = child_setup,
.user_data = user_data,
.stdin_fd = stdin_fd,
.stdout_fd = stdout_fd,
.stderr_fd = stderr_fd,
};
return g_spawn_async(working_directory, argv, envp, flags,
qemu_gspawn_fds_setup, &setup,
child_pid, error);
#endif
}
#define g_spawn_async_with_fds(wd, argv, env, f, c, d, p, ifd, ofd, efd, err) \
g_spawn_async_with_fds_qemu(wd, argv, env, f, c, d, p, ifd, ofd, efd, err)
#if defined(_WIN32) && !GLIB_CHECK_VERSION(2, 50, 0)
/*
* g_poll has a problem on Windows when using
* timeouts < 10ms, so use wrapper.
*/
#define g_poll(fds, nfds, timeout) g_poll_fixed(fds, nfds, timeout)
gint g_poll_fixed(GPollFD *fds, guint nfds, gint timeout);
#endif
#ifndef g_assert_cmpmem
#define g_assert_cmpmem(m1, l1, m2, l2) \
do { \
gconstpointer __m1 = m1, __m2 = m2; \
int __l1 = l1, __l2 = l2; \
if (__l1 != __l2) { \
g_assertion_message_cmpnum( \
G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
#l1 " (len(" #m1 ")) == " #l2 " (len(" #m2 "))", __l1, "==", \
__l2, 'i'); \
} else if (memcmp(__m1, __m2, __l1) != 0) { \
g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
"assertion failed (" #m1 " == " #m2 ")"); \
} \
} while (0)
#endif
#pragma GCC diagnostic pop
#endif
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