Embedded PowerPC Device Control Registers infrastructure.

[qemu] / osdep.c

diff --git a/osdep.c b/osdep.c
index 348fcf2..ccc1d70 100644 (file)
--- a/osdep.c
+++ b/osdep.c
@@ -27,6 +27,11 @@
 #include <string.h>
 #include <errno.h>
 #include <unistd.h>
+#include <fcntl.h>
+#ifdef HOST_SOLARIS
+#include <sys/types.h>
+#include <sys/statvfs.h>
+#endif
 
 #include "cpu.h"
 #if defined(USE_KQEMU)
@@ -86,13 +91,22 @@ void *kqemu_vmalloc(size_t size)
     const char *tmpdir;
     char phys_ram_file[1024];
     void *ptr;
+#ifdef HOST_SOLARIS
+    struct statvfs stfs;
+#else
     struct statfs stfs;
+#endif
 
     if (phys_ram_fd < 0) {
         tmpdir = getenv("QEMU_TMPDIR");
         if (!tmpdir)
+#ifdef HOST_SOLARIS
+            tmpdir = "/tmp";
+        if (statvfs(tmpdir, &stfs) == 0) {
+#else
             tmpdir = "/dev/shm";
         if (statfs(tmpdir, &stfs) == 0) {
+#endif
             int64_t free_space;
             int ram_mb;
 
@@ -120,7 +134,8 @@ void *kqemu_vmalloc(size_t size)
         }
         snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", 
                  tmpdir);
-        if (mkstemp(phys_ram_file) < 0) {
+        phys_ram_fd = mkstemp(phys_ram_file);
+        if (phys_ram_fd < 0) {
             fprintf(stderr, 
                     "warning: could not create temporary file in '%s'.\n"
                     "Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
@@ -128,18 +143,13 @@ void *kqemu_vmalloc(size_t size)
                     tmpdir);
             snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX", 
                      "/tmp");
-            if (mkstemp(phys_ram_file) < 0) {
+            phys_ram_fd = mkstemp(phys_ram_file);
+            if (phys_ram_fd < 0) {
                 fprintf(stderr, "Could not create temporary memory file '%s'\n", 
                         phys_ram_file);
                 exit(1);
             }
         }
-        phys_ram_fd = open(phys_ram_file, O_CREAT | O_TRUNC | O_RDWR, 0600);
-        if (phys_ram_fd < 0) {
-            fprintf(stderr, "Could not open temporary memory file '%s'\n", 
-                    phys_ram_file);
-            exit(1);
-        }
         unlink(phys_ram_file);
     }
     size = (size + 4095) & ~4095;
@@ -207,3 +217,50 @@ char *qemu_strdup(const char *str)
     strcpy(ptr, str);
     return ptr;
 }
+
+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;
+
+    if (lockf(fd, F_TLOCK, 0) == -1)
+        return -1;
+
+    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;
+#endif
+    return 0;
+}