#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
-#ifdef CONFIG_SOLARIS
-#include <sys/types.h>
-#include <sys/statvfs.h>
-#endif
-
-/* FIXME: This file should be target independent. However it has kqemu
- hacks, so must be built for every target. */
/* Needed early for CONFIG_BSD etc. */
#include "config-host.h"
-#ifdef _WIN32
-#include <windows.h>
-#elif defined(CONFIG_BSD)
-#include <stdlib.h>
-#else
-#include <malloc.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
#include "qemu-common.h"
-#include "sysemu.h"
+#include "trace.h"
#include "qemu_socket.h"
-#if !defined(_POSIX_C_SOURCE) || defined(_WIN32)
-static void *oom_check(void *ptr)
+int socket_set_cork(int fd, int v)
{
- if (ptr == NULL) {
- abort();
- }
- return ptr;
-}
+#if defined(SOL_TCP) && defined(TCP_CORK)
+ return setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v));
+#else
+ return 0;
#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);
+#if defined(CONFIG_MADVISE)
+ return madvise(addr, len, advice);
+#elif defined(CONFIG_POSIX_MADVISE)
+ return posix_madvise(addr, len, advice);
+#else
+ errno = EINVAL;
+ return -1;
+#endif
}
-#else
-void *qemu_memalign(size_t alignment, size_t size)
+/*
+ * Opens a file with FD_CLOEXEC set
+ */
+int qemu_open(const char *name, int flags, ...)
{
-#if defined(_POSIX_C_SOURCE)
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));
+ int mode = 0;
+
+ if (flags & O_CREAT) {
+ va_list ap;
+
+ va_start(ap, flags);
+ mode = va_arg(ap, int);
+ va_end(ap);
+ }
+
+#ifdef O_CLOEXEC
+ ret = open(name, flags | O_CLOEXEC, mode);
#else
- return oom_check(memalign(alignment, size));
+ ret = open(name, flags, mode);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
+ }
#endif
+
+ return ret;
}
-/* alloc shared memory pages */
-void *qemu_vmalloc(size_t size)
+/*
+ * 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
+ */
+ssize_t qemu_write_full(int fd, const void *buf, size_t count)
{
- return qemu_memalign(getpagesize(), size);
+ 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 total;
}
-void qemu_vfree(void *ptr)
+/*
+ * Opens a socket with FD_CLOEXEC set
+ */
+int qemu_socket(int domain, int type, int protocol)
{
- free(ptr);
-}
+ int ret;
+#ifdef SOCK_CLOEXEC
+ ret = socket(domain, type | SOCK_CLOEXEC, protocol);
+ if (ret != -1 || errno != EINVAL) {
+ return ret;
+ }
#endif
+ ret = socket(domain, type, protocol);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
+ }
-int qemu_create_pidfile(const char *filename)
-{
- char buffer[128];
- int len;
-#ifndef _WIN32
- int fd;
-
- fd = open(filename, O_RDWR | O_CREAT, 0600);
- if (fd == -1)
- return -1;
+ return ret;
+}
- if (lockf(fd, F_TLOCK, 0) == -1)
- return -1;
+/*
+ * Accept a connection and set FD_CLOEXEC
+ */
+int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
+{
+ int ret;
- len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
- if (write(fd, buffer, len) != len)
- return -1;
-#else
- HANDLE file;
- DWORD flags;
- OVERLAPPED overlap;
- BOOL ret;
-
- /* Open for writing with no sharing. */
- file = CreateFile(filename, GENERIC_WRITE, 0, NULL,
- OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
-
- if (file == INVALID_HANDLE_VALUE)
- return -1;
-
- flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY;
- overlap.hEvent = 0;
- /* Lock 1 byte. */
- ret = LockFileEx(file, flags, 0, 0, 1, &overlap);
- if (ret == 0)
- return -1;
-
- /* Write PID to file. */
- len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
- ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
- &overlap, NULL);
- if (ret == 0)
- return -1;
+#ifdef CONFIG_ACCEPT4
+ ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
+ if (ret != -1 || errno != ENOSYS) {
+ return ret;
+ }
#endif
- return 0;
-}
-
-#ifdef _WIN32
+ ret = accept(s, addr, addrlen);
+ if (ret >= 0) {
+ qemu_set_cloexec(ret);
+ }
-/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
-#define _W32_FT_OFFSET (116444736000000000ULL)
+ return ret;
+}
-int qemu_gettimeofday(qemu_timeval *tp)
+/*
+ * A variant of send(2) which handles partial write.
+ *
+ * Return the number of bytes transferred, which is only
+ * smaller than `count' if there is an error.
+ *
+ * This function won'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
+ */
+ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
{
- 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);
+ ssize_t ret = 0;
+ ssize_t total = 0;
+
+ while (count) {
+ ret = send(fd, buf, count, flags);
+ if (ret < 0) {
+ if (errno == EINTR) {
+ continue;
+ }
+ break;
+ }
+
+ count -= ret;
+ buf += ret;
+ total += ret;
}
- /* 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);
+ return total;
}
-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;
-}
-#else
-void socket_set_nonblock(int fd)
+/*
+ * A variant of recv(2) which handles partial write.
+ *
+ * Return the number of bytes transferred, which is only
+ * smaller than `count' if there is an error.
+ *
+ * This function won'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
+ */
+ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
{
- int f;
- f = fcntl(fd, F_GETFL);
- fcntl(fd, F_SETFL, f | O_NONBLOCK);
+ ssize_t ret = 0;
+ ssize_t total = 0;
+
+ while (count) {
+ ret = qemu_recv(fd, buf, count, flags);
+ if (ret <= 0) {
+ if (ret < 0 && errno == EINTR) {
+ continue;
+ }
+ break;
+ }
+
+ count -= ret;
+ buf += ret;
+ total += ret;
+ }
+
+ return total;
}
-#endif
+
projects / qemu.git / blobdiff