9a1e948129
Add the possibility to use AIO and BHs without allowing foreign callbacks to be run. Basically, you put your own AIOs and BHs in a separate context. For details see the comments in the source. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
256 lines
7.2 KiB
C
256 lines
7.2 KiB
C
/* Common header file that is included by all of qemu. */
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#ifndef QEMU_COMMON_H
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#define QEMU_COMMON_H
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#define QEMU_NORETURN __attribute__ ((__noreturn__))
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#ifdef CONFIG_GCC_ATTRIBUTE_WARN_UNUSED_RESULT
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#define QEMU_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#else
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#define QEMU_WARN_UNUSED_RESULT
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#endif
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/* Hack around the mess dyngen-exec.h causes: We need QEMU_NORETURN in files that
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cannot include the following headers without conflicts. This condition has
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to be removed once dyngen is gone. */
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#ifndef __DYNGEN_EXEC_H__
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/* we put basic includes here to avoid repeating them in device drivers */
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <strings.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <time.h>
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#include <ctype.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include "config-host.h"
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#ifndef O_LARGEFILE
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#define O_LARGEFILE 0
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#endif
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef MAP_ANONYMOUS
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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#ifndef ENOMEDIUM
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#define ENOMEDIUM ENODEV
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#endif
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#if !defined(ENOTSUP)
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#define ENOTSUP 4096
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#endif
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#ifndef CONFIG_IOVEC
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#define CONFIG_IOVEC
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struct iovec {
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void *iov_base;
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size_t iov_len;
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};
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#else
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#include <sys/uio.h>
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#endif
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#ifdef _WIN32
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#define fsync _commit
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#define lseek _lseeki64
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extern int qemu_ftruncate64(int, int64_t);
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#define ftruncate qemu_ftruncate64
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static inline char *realpath(const char *path, char *resolved_path)
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{
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_fullpath(resolved_path, path, _MAX_PATH);
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return resolved_path;
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}
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#define PRId64 "I64d"
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#define PRIx64 "I64x"
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#define PRIu64 "I64u"
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#define PRIo64 "I64o"
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#endif
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/* FIXME: Remove NEED_CPU_H. */
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#ifndef NEED_CPU_H
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#include <setjmp.h>
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#include "osdep.h"
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#include "bswap.h"
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#else
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#include "cpu.h"
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#endif /* !defined(NEED_CPU_H) */
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/* bottom halves */
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typedef struct QEMUBH QEMUBH;
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typedef void QEMUBHFunc(void *opaque);
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void async_context_push(void);
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void async_context_pop(void);
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int get_async_context_id(void);
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QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque);
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void qemu_bh_schedule(QEMUBH *bh);
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/* Bottom halfs that are scheduled from a bottom half handler are instantly
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* invoked. This can create an infinite loop if a bottom half handler
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* schedules itself. qemu_bh_schedule_idle() avoids this infinite loop by
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* ensuring that the bottom half isn't executed until the next main loop
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* iteration.
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*/
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void qemu_bh_schedule_idle(QEMUBH *bh);
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void qemu_bh_cancel(QEMUBH *bh);
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void qemu_bh_delete(QEMUBH *bh);
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int qemu_bh_poll(void);
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void qemu_bh_update_timeout(int *timeout);
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uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c);
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void qemu_get_timedate(struct tm *tm, int offset);
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int qemu_timedate_diff(struct tm *tm);
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/* cutils.c */
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void pstrcpy(char *buf, int buf_size, const char *str);
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char *pstrcat(char *buf, int buf_size, const char *s);
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int strstart(const char *str, const char *val, const char **ptr);
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int stristart(const char *str, const char *val, const char **ptr);
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int qemu_strnlen(const char *s, int max_len);
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time_t mktimegm(struct tm *tm);
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int qemu_fls(int i);
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int qemu_fdatasync(int fd);
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/* path.c */
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void init_paths(const char *prefix);
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const char *path(const char *pathname);
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#define qemu_isalnum(c) isalnum((unsigned char)(c))
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#define qemu_isalpha(c) isalpha((unsigned char)(c))
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#define qemu_iscntrl(c) iscntrl((unsigned char)(c))
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#define qemu_isdigit(c) isdigit((unsigned char)(c))
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#define qemu_isgraph(c) isgraph((unsigned char)(c))
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#define qemu_islower(c) islower((unsigned char)(c))
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#define qemu_isprint(c) isprint((unsigned char)(c))
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#define qemu_ispunct(c) ispunct((unsigned char)(c))
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#define qemu_isspace(c) isspace((unsigned char)(c))
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#define qemu_isupper(c) isupper((unsigned char)(c))
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#define qemu_isxdigit(c) isxdigit((unsigned char)(c))
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#define qemu_tolower(c) tolower((unsigned char)(c))
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#define qemu_toupper(c) toupper((unsigned char)(c))
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#define qemu_isascii(c) isascii((unsigned char)(c))
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#define qemu_toascii(c) toascii((unsigned char)(c))
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void *qemu_malloc(size_t size);
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void *qemu_realloc(void *ptr, size_t size);
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void *qemu_mallocz(size_t size);
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void qemu_free(void *ptr);
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char *qemu_strdup(const char *str);
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char *qemu_strndup(const char *str, size_t size);
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void *get_mmap_addr(unsigned long size);
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void qemu_mutex_lock_iothread(void);
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void qemu_mutex_unlock_iothread(void);
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/* Error handling. */
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void QEMU_NORETURN hw_error(const char *fmt, ...)
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__attribute__ ((__format__ (__printf__, 1, 2)));
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/* IO callbacks. */
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typedef void IOReadHandler(void *opaque, const uint8_t *buf, int size);
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typedef int IOCanRWHandler(void *opaque);
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typedef void IOHandler(void *opaque);
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struct ParallelIOArg {
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void *buffer;
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int count;
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};
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typedef int (*DMA_transfer_handler) (void *opaque, int nchan, int pos, int size);
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/* A load of opaque types so that device init declarations don't have to
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pull in all the real definitions. */
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typedef struct NICInfo NICInfo;
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typedef struct HCIInfo HCIInfo;
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typedef struct AudioState AudioState;
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typedef struct BlockDriverState BlockDriverState;
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typedef struct DisplayState DisplayState;
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typedef struct DisplayChangeListener DisplayChangeListener;
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typedef struct DisplaySurface DisplaySurface;
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typedef struct DisplayAllocator DisplayAllocator;
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typedef struct PixelFormat PixelFormat;
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typedef struct TextConsole TextConsole;
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typedef TextConsole QEMUConsole;
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typedef struct CharDriverState CharDriverState;
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typedef struct MACAddr MACAddr;
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typedef struct VLANState VLANState;
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typedef struct VLANClientState VLANClientState;
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typedef struct QEMUFile QEMUFile;
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typedef struct i2c_bus i2c_bus;
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typedef struct i2c_slave i2c_slave;
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typedef struct SMBusDevice SMBusDevice;
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typedef struct QEMUTimer QEMUTimer;
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typedef struct PCIBus PCIBus;
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typedef struct PCIDevice PCIDevice;
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typedef struct SerialState SerialState;
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typedef struct IRQState *qemu_irq;
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typedef struct PCMCIACardState PCMCIACardState;
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typedef struct MouseTransformInfo MouseTransformInfo;
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typedef struct uWireSlave uWireSlave;
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typedef struct I2SCodec I2SCodec;
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typedef struct DeviceState DeviceState;
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typedef struct SSIBus SSIBus;
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/* CPU save/load. */
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void cpu_save(QEMUFile *f, void *opaque);
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int cpu_load(QEMUFile *f, void *opaque, int version_id);
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/* Force QEMU to stop what it's doing and service IO */
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void qemu_service_io(void);
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/* Force QEMU to process pending events */
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void qemu_notify_event(void);
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/* Unblock cpu */
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void qemu_cpu_kick(void *env);
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int qemu_cpu_self(void *env);
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#ifdef CONFIG_USER_ONLY
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#define qemu_init_vcpu(env) do { } while (0)
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#else
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void qemu_init_vcpu(void *env);
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#endif
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typedef struct QEMUIOVector {
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struct iovec *iov;
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int niov;
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int nalloc;
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size_t size;
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} QEMUIOVector;
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void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
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void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
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void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
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void qemu_iovec_concat(QEMUIOVector *dst, QEMUIOVector *src, size_t size);
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void qemu_iovec_destroy(QEMUIOVector *qiov);
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void qemu_iovec_reset(QEMUIOVector *qiov);
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void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf);
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void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf, size_t count);
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struct Monitor;
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typedef struct Monitor Monitor;
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#include "module.h"
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#endif /* dyngen-exec.h hack */
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#endif
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