diff options
Diffstat (limited to 'include/qemu/osdep.h')
| -rw-r--r-- | include/qemu/osdep.h | 43 |
1 files changed, 31 insertions, 12 deletions
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index a733294710..baaa23c156 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -169,6 +169,23 @@ extern "C" { #define assert(x) g_assert(x) #endif +/** + * qemu_build_not_reached() + * + * The compiler, during optimization, is expected to prove that a call + * to this function cannot be reached and remove it. If the compiler + * supports QEMU_ERROR, this will be reported at compile time; otherwise + * this will be reported at link time due to the missing symbol. + */ +extern G_NORETURN +void QEMU_ERROR("code path is reachable") + qemu_build_not_reached_always(void); +#if defined(__OPTIMIZE__) && !defined(__NO_INLINE__) +#define qemu_build_not_reached() qemu_build_not_reached_always() +#else +#define qemu_build_not_reached() g_assert_not_reached() +#endif + /* * According to waitpid man page: * WCOREDUMP @@ -539,16 +556,13 @@ void qemu_set_cloexec(int fd); void fips_set_state(bool requested); bool fips_get_state(void); -/* Return a dynamically allocated pathname denoting a file or directory that is - * appropriate for storing local state. - * - * @relative_pathname need not start with a directory separator; one will be - * added automatically. +/* Return a dynamically allocated directory path that is appropriate for storing + * local state. * * The caller is responsible for releasing the value returned with g_free() * after use. */ -char *qemu_get_local_state_pathname(const char *relative_pathname); +char *qemu_get_local_state_dir(void); /* Find program directory, and save it for later usage with * qemu_get_exec_dir(). @@ -624,15 +638,20 @@ static inline void qemu_reset_optind(void) #endif } +int qemu_fdatasync(int fd); + /** - * qemu_get_host_name: - * @errp: Error object - * - * Operating system agnostic way of querying host name. + * Sync changes made to the memory mapped file back to the backing + * storage. For POSIX compliant systems this will fallback + * to regular msync call. Otherwise it will trigger whole file sync + * (including the metadata case there is no support to skip that otherwise) * - * Returns allocated hostname (caller should free), NULL on failure. + * @addr - start of the memory area to be synced + * @length - length of the are to be synced + * @fd - file descriptor for the file to be synced + * (mandatory only for POSIX non-compliant systems) */ -char *qemu_get_host_name(Error **errp); +int qemu_msync(void *addr, size_t length, int fd); /** * qemu_get_host_physmem: |