[t:2493] Port filesystem redzone to windows

git-svn-id: file:///svn/toku/tokudb@19294 c7de825b-a66e-492c-adef-691d508d4ae1

windows/tests/test-filesystem-sizes.c

+#define _CRT_SECURE_NO_DEPRECATE
+#include <test.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <toku_stdint.h>
+#include <unistd.h>
+#include <toku_assert.h>
+#include "toku_os.h"
+
+int test_main(int argc, char *const argv[]) {
+    int verbose = 0;
+    int limit = 1;
+
+    for (int i = 1; i < argc; i++) {
+        if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) {
+            verbose = 1;
+            continue;
+        }
+        if (strcmp(argv[i], "--timeit") == 0) {
+            limit = 100000;
+            continue;
+        }
+    }
+
+    int r;
+
+#if 0
+    r = toku_get_filesystem_sizes(NULL, NULL, NULL, NULL);
+    assert(r == EFAULT);
+#endif
+
+    r = toku_get_filesystem_sizes(".", NULL, NULL, NULL);
+    assert(r == 0);
+
+    uint64_t free_size = 0, avail_size = 0, total_size = 0;
+    for (int i = 0; i < limit; i++) {
+        r = toku_get_filesystem_sizes(".", &avail_size, &free_size, &total_size);
+        assert(r == 0);
+        assert(avail_size <= free_size && free_size <= total_size);
+    }
+    if (verbose) {
+        printf("avail=%"PRIu64"\n", avail_size);
+        printf("free=%"PRIu64"\n", free_size);
+        printf("total=%"PRIu64"\n", total_size);
+    }
+
+    return 0;
+}

windows/windows.c

@@ -347,13 +347,24 @@ toku_dup2(int fd, int fd2) {
 // for now, just return zeros 
 int 
 toku_get_filesystem_sizes(const char *path, uint64_t *avail_size, uint64_t *free_size, uint64_t *total_size) {
-    uint64_t a = 0, f = 0, t = 0;
-    path = path;
-    if (avail_size)
-        *avail_size = a;
-    if (free_size)
-        *free_size = f;
-    if (total_size)
-        *total_size = t;
-    return 0;
+    int r;
+    ULARGE_INTEGER free_bytes_for_user;
+    ULARGE_INTEGER free_bytes_total;
+    ULARGE_INTEGER total_bytes;
+
+    BOOL success = GetDiskFreeSpaceEx(path,
+                                      &free_bytes_for_user,
+                                      &total_bytes,
+                                      &free_bytes_total);
+    if (success) {
+        r = 0;
+        if (avail_size) *avail_size = free_bytes_for_user.QuadPart;
+        if (free_size)  *free_size  = free_bytes_total.QuadPart;
+        if (total_size) *total_size = total_bytes.QuadPart;
+    }
+    else {
+        r = GetLastError();
+    }
+    return r;
 }
+