merge some tokudb.1032 into 1032b. addresses #1032

git-svn-id: file:///svn/toku/tokudb.1032b@7778 c7de825b-a66e-492c-adef-691d508d4ae1

linux/linux.c

@@ -0,0 +1,165 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/file.h>
+#include <syscall.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <assert.h>
+#include "portability.h"
+#include "os.h"
+
+int
+os_getpid(void) {
+    return getpid();
+}
+
+int
+os_gettid(void) {
+    return syscall(__NR_gettid);
+}
+
+int
+os_get_number_processors(void) {
+    return sysconf(_SC_NPROCESSORS_CONF);
+}
+
+int
+os_get_number_active_processors(void) {
+    return sysconf(_SC_NPROCESSORS_ONLN);
+}
+
+int
+os_get_pagesize(void) {
+    return sysconf(_SC_PAGESIZE);
+}
+
+uint64_t
+os_get_phys_memory_size(void) {
+    uint64_t npages = sysconf(_SC_PHYS_PAGES);
+    uint64_t pagesize = sysconf(_SC_PAGESIZE);
+    return npages*pagesize;
+}
+
+int
+os_get_file_size(int fildes, int64_t *fsize) {
+    struct stat sbuf;
+    int r = fstat(fildes, &sbuf);
+    if (r==0) {
+        *fsize = sbuf.st_size;
+    }
+    return r;
+}
+
+int
+os_get_unique_file_id(int fildes, struct fileid *id) {
+    struct stat statbuf;
+    memset(id, 0, sizeof(*id));
+    int r=fstat(fildes, &statbuf);
+    if (r==0) {
+        memset(id, 0, sizeof(*id));
+        id->st_dev = statbuf.st_dev;
+        id->st_ino = statbuf.st_ino;
+    }
+    return r;
+}
+
+int
+os_lock_file(char *name) {
+    int r;
+    int fd = open(name, O_RDWR|O_CREAT, S_IRUSR | S_IWUSR);
+    if (fd>=0) {
+        r = flock(fd, LOCK_EX | LOCK_NB);
+        if (r!=0) {
+            r = errno; //Save errno from flock.
+            close(fd);
+            fd = -1; //Disable fd.
+            errno = r;
+        }
+    }
+    return fd;
+}
+
+int
+os_unlock_file(int fildes) {
+    int r = flock(fildes, LOCK_UN);
+    if (r==0) r = close(fildes);
+    return r;
+}
+
+int
+os_mkdir(const char *pathname, mode_t mode) {
+    int r = mkdir(pathname, mode);
+    return r;
+}
+
+int
+os_get_process_times(struct timeval *usertime, struct timeval *kerneltime) {
+    int r;
+    struct rusage rusage;
+    r = getrusage(RUSAGE_SELF, &rusage);
+    if (r == -1)
+        return errno;
+    if (usertime) 
+        *usertime = rusage.ru_utime;
+    if (kerneltime)
+        *kerneltime = rusage.ru_stime;
+    return 0;
+}
+
+int
+os_initialize_settings(int UU(verbosity)) {
+    int r = 0;
+    static int initialized = 0;
+    assert(initialized==0);
+    initialized=1;
+    return r;
+}
+
+int
+os_get_max_rss(int64_t *maxrss) {
+    char statusname[100];
+    sprintf(statusname, "/proc/%d/status", getpid());
+    FILE *f = fopen(statusname, "r");
+    if (f == NULL)
+        return errno;
+    int r = ENOENT;
+    char line[100];
+    while (fgets(line, sizeof line, f)) {
+        r = sscanf(line, "VmHWM:\t%lld kB\n", (long long *) maxrss);
+        if (r == 1) { 
+            *maxrss *= 1<<10;
+            r = 0;
+            break;
+        }
+    }
+    fclose(f);
+    return r;
+}
+
+int
+os_get_rss(int64_t *rss) {
+    char statusname[100];
+    sprintf(statusname, "/proc/%d/status", getpid());
+    FILE *f = fopen(statusname, "r");
+    if (f == NULL)
+        return errno;
+    int r = ENOENT;
+    char line[100];
+    while (fgets(line, sizeof line, f)) {
+        r = sscanf(line, "VmRSS:\t%lld kB\n", (long long *) rss);
+        if (r == 1) {
+            *rss *= 1<<10;
+            r = 0;
+            break;
+        }
+    }
+    fclose(f);
+    return r;
+}