#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
+
+/* Needed early for CONFIG_BSD etc. */
+#include "config-host.h"
+
+#if defined(CONFIG_MADVISE) || defined(CONFIG_POSIX_MADVISE)
+#include <sys/mman.h>
+#endif
+
#ifdef CONFIG_SOLARIS
#include <sys/types.h>
#include <sys/statvfs.h>
+/* See MySQL bug #7156 (http://bugs.mysql.com/bug.php?id=7156) for
+ discussion about Solaris header problems */
+extern int madvise(caddr_t, size_t, int);
#endif
-/* Needed early for CONFIG_BSD etc. */
-#include "config-host.h"
-
#ifdef _WIN32
#include <windows.h>
#elif defined(CONFIG_BSD)
#endif
#include "qemu-common.h"
+#include "trace.h"
#include "sysemu.h"
#include "qemu_socket.h"
-#if !defined(_POSIX_C_SOURCE) || defined(_WIN32) || defined(__sun__)
-static void *oom_check(void *ptr)
-{
- if (ptr == NULL) {
- abort();
- }
- return ptr;
-}
-#endif
-
-#if defined(_WIN32)
-void *qemu_memalign(size_t alignment, size_t size)
-{
- if (!size) {
- abort();
- }
- return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
-}
-
-void *qemu_vmalloc(size_t size)
+int qemu_madvise(void *addr, size_t len, int advice)
{
- /* FIXME: this is not exactly optimal solution since VirtualAlloc
- has 64Kb granularity, but at least it guarantees us that the
- memory is page aligned. */
- if (!size) {
- abort();
+ if (advice == QEMU_MADV_INVALID) {
+ errno = EINVAL;
+ return -1;
}
- return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
-}
-
-void qemu_vfree(void *ptr)
-{
- VirtualFree(ptr, 0, MEM_RELEASE);
-}
-
-#else
-
-void *qemu_memalign(size_t alignment, size_t size)
-{
-#if defined(_POSIX_C_SOURCE) && !defined(__sun__)
- int ret;
- void *ptr;
- ret = posix_memalign(&ptr, alignment, size);
- if (ret != 0)
- abort();
- return ptr;
-#elif defined(CONFIG_BSD)
- return oom_check(valloc(size));
+#if defined(CONFIG_MADVISE)
+ return madvise(addr, len, advice);
+#elif defined(CONFIG_POSIX_MADVISE)
+ return posix_madvise(addr, len, advice);
#else
- return oom_check(memalign(alignment, size));
+ errno = EINVAL;
+ return -1;
#endif
}
-/* alloc shared memory pages */
-void *qemu_vmalloc(size_t size)
-{
- return qemu_memalign(getpagesize(), size);
-}
-
-void qemu_vfree(void *ptr)
-{
- free(ptr);
-}
-
-#endif
-
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
return 0;
}
-#ifdef _WIN32
-
-/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
-#define _W32_FT_OFFSET (116444736000000000ULL)
-
-int qemu_gettimeofday(qemu_timeval *tp)
-{
- union {
- unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
- FILETIME ft;
- } _now;
-
- if(tp)
- {
- GetSystemTimeAsFileTime (&_now.ft);
- tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
- tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
- }
- /* Always return 0 as per Open Group Base Specifications Issue 6.
- Do not set errno on error. */
- return 0;
-}
-#endif /* _WIN32 */
-
-
-#ifdef _WIN32
-void socket_set_nonblock(int fd)
-{
- unsigned long opt = 1;
- ioctlsocket(fd, FIONBIO, &opt);
-}
-
-int inet_aton(const char *cp, struct in_addr *ia)
-{
- uint32_t addr = inet_addr(cp);
- if (addr == 0xffffffff)
- return 0;
- ia->s_addr = addr;
- return 1;
-}
-
-void qemu_set_cloexec(int fd)
-{
-}
-
-#else
-
-void socket_set_nonblock(int fd)
-{
- int f;
- f = fcntl(fd, F_GETFL);
- fcntl(fd, F_SETFL, f | O_NONBLOCK);
-}
-
-void qemu_set_cloexec(int fd)
-{
- int f;
- f = fcntl(fd, F_GETFD);
- fcntl(fd, F_SETFD, f | FD_CLOEXEC);
-}
-
-#endif
/*
* Opens a file with FD_CLOEXEC set
return ret;
}
-#ifndef _WIN32
/*
- * Creates a pipe with FD_CLOEXEC set on both file descriptors
+ * A variant of write(2) which handles partial write.
+ *
+ * Return the number of bytes transferred.
+ * Set errno if fewer than `count' bytes are written.
+ *
+ * This function don't work with non-blocking fd's.
+ * Any of the possibilities with non-bloking fd's is bad:
+ * - return a short write (then name is wrong)
+ * - busy wait adding (errno == EAGAIN) to the loop
*/
-int qemu_pipe(int pipefd[2])
-{
- int ret;
-
-#ifdef CONFIG_PIPE2
- ret = pipe2(pipefd, O_CLOEXEC);
- if (ret != -1 || errno != ENOSYS) {
- return ret;
- }
-#endif
- ret = pipe(pipefd);
- if (ret == 0) {
- qemu_set_cloexec(pipefd[0]);
- qemu_set_cloexec(pipefd[1]);
+ssize_t qemu_write_full(int fd, const void *buf, size_t count)
+{
+ ssize_t ret = 0;
+ ssize_t total = 0;
+
+ while (count) {
+ ret = write(fd, buf, count);
+ if (ret < 0) {
+ if (errno == EINTR)
+ continue;
+ break;
+ }
+
+ count -= ret;
+ buf += ret;
+ total += ret;
}
- return ret;
+ return total;
}
-#endif
/*
* Opens a socket with FD_CLOEXEC set
#ifdef CONFIG_ACCEPT4
ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
- if (ret != -1 || errno != EINVAL) {
+ if (ret != -1 || errno != ENOSYS) {
return ret;
}
#endif