(win32) Add mmap implementation
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@ -14,8 +14,14 @@
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#include <stdlib.h> /* free */
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#include <string.h>
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#ifdef WIN32
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#include <windows.h>
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#endif
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#include <libgen.h> /* basename */
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#ifndef WIN32
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#include <sys/mman.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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@ -24,6 +30,7 @@
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#include "ggets.h"
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#include "transmission.h"
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#include "platform.h"
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#include "blocklist.h"
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#include "net.h" /* tr_netResolve() */
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#include "utils.h"
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@ -80,7 +87,11 @@ blocklistLoad( tr_blocklist * b )
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return;
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}
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#ifndef WIN32
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b->rules = mmap( NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0 );
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#else
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b->rules = mmap( NULL, st.st_size, 0, 0, fd, 0 );
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#endif
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if( !b->rules ) {
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tr_err( err_fmt, b->filename, tr_strerror(errno) );
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close( fd );
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@ -638,3 +638,73 @@ tr_lockfile( const char * filename )
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return ret;
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}
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#ifdef WIN32
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/* The following mmap functions are by Joerg Walter, and were taken from
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* his paper at: http://www.genesys-e.de/jwalter/mix4win.htm
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*/
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/* Wait for spin lock */
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static int slwait (int *sl) {
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while (InterlockedCompareExchange ((void **) sl, (void *) 1, (void *) 0) != 0)
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Sleep (0);
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return 0;
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}
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/* Release spin lock */
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static int slrelease (int *sl) {
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InterlockedExchange (sl, 0);
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return 0;
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}
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static int g_sl;
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void *mmap (void *ptr, long size, long prot, long type, long handle, long arg) {
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static long g_pagesize;
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static long g_regionsize;
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/* Wait for spin lock */
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slwait (&g_sl);
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/* First time initialization */
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if (! g_pagesize)
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g_pagesize = getpagesize ();
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if (! g_regionsize)
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g_regionsize = getregionsize ();
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/* Allocate this */
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ptr = VirtualAlloc (ptr, size,
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MEM_RESERVE | MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE);
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if (! ptr) {
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ptr = MMAP_FAILURE;
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goto mmap_exit;
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}
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mmap_exit:
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/* Release spin lock */
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slrelease (&g_sl);
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return ptr;
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}
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long munmap (void *ptr, long size) {
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static long g_pagesize;
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static long g_regionsize;
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int rc = MUNMAP_FAILURE;
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/* Wait for spin lock */
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slwait (&g_sl);
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/* First time initialization */
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if (! g_pagesize)
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g_pagesize = getpagesize ();
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if (! g_regionsize)
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g_regionsize = getregionsize ();
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/* Free this */
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if (! VirtualFree (ptr, 0,
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MEM_RELEASE))
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goto munmap_exit;
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rc = 0;
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munmap_exit:
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/* Release spin lock */
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slrelease (&g_sl);
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return rc;
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}
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#endif
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@ -58,4 +58,9 @@ int tr_lockHave ( const tr_lock * );
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tr_lockfile_state_t tr_lockfile ( const char * filename );
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#ifdef WIN32
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void *mmap (void *ptr, long size, long prot, long type, long handle, long arg);
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long munmap (void *ptr, long size);
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#endif
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#endif
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