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Diffstat (limited to 'winsup/cygwin/shared.cc')
-rw-r--r--winsup/cygwin/shared.cc290
1 files changed, 0 insertions, 290 deletions
diff --git a/winsup/cygwin/shared.cc b/winsup/cygwin/shared.cc
deleted file mode 100644
index 4e54a7558..000000000
--- a/winsup/cygwin/shared.cc
+++ /dev/null
@@ -1,290 +0,0 @@
-/* shared.cc: shared data area support.
-
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
- 2006 Red Hat, Inc.
-
-This file is part of Cygwin.
-
-This software is a copyrighted work licensed under the terms of the
-Cygwin license. Please consult the file "CYGWIN_LICENSE" for
-details. */
-
-#include "winsup.h"
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <grp.h>
-#include <pwd.h>
-#include "cygerrno.h"
-#include "pinfo.h"
-#include "security.h"
-#include "path.h"
-#include "fhandler.h"
-#include "dtable.h"
-#include "cygheap.h"
-#include "heap.h"
-#include "shared_info_magic.h"
-#include "registry.h"
-#include "cygwin_version.h"
-#include "child_info.h"
-#include "mtinfo.h"
-
-static shared_info cygwin_shared_area __attribute__((section (".cygwin_dll_common"), shared));
-shared_info NO_COPY *cygwin_shared;
-user_info NO_COPY *user_shared;
-HANDLE NO_COPY cygwin_user_h;
-
-char * __stdcall
-shared_name (char *ret_buf, const char *str, int num)
-{
- extern bool _cygwin_testing;
-
- __small_sprintf (ret_buf, "%s%s.%s.%d", cygheap->shared_prefix,
- cygwin_version.shared_id, str, num);
- if (_cygwin_testing)
- strcat (ret_buf, cygwin_version.dll_build_date);
- return ret_buf;
-}
-
-#define page_const (65535)
-#define pround(n) (((size_t) (n) + page_const) & ~page_const)
-
-static ptrdiff_t offsets[] =
-{
- - pround (sizeof (user_info))
- - pround (sizeof (console_state))
- - pround (sizeof (_pinfo)),
- - pround (sizeof (console_state))
- - pround (sizeof (_pinfo)),
- - pround (sizeof (_pinfo)),
- 0
-};
-
-#define off_addr(x) ((void *)((caddr_t) cygwin_hmodule + offsets[x]))
-
-void * __stdcall
-open_shared (const char *name, int n, HANDLE& shared_h, DWORD size,
- shared_locations& m, PSECURITY_ATTRIBUTES psa, DWORD access)
-{
- void *shared;
-
- void *addr;
- if ((m == SH_JUSTCREATE || m == SH_JUSTOPEN)
- || !wincap.needs_memory_protection () && offsets[0])
- addr = NULL;
- else
- {
- addr = off_addr (m);
- VirtualFree (addr, 0, MEM_RELEASE);
- }
-
- char map_buf[CYG_MAX_PATH];
- char *mapname = NULL;
-
- if (shared_h)
- m = SH_JUSTOPEN;
- else
- {
- if (name)
- mapname = shared_name (map_buf, name, n);
- if (m == SH_JUSTOPEN)
- shared_h = OpenFileMapping (access, FALSE, mapname);
- else
- {
- shared_h = CreateFileMapping (INVALID_HANDLE_VALUE, psa, PAGE_READWRITE,
- 0, size, mapname);
- if (GetLastError () == ERROR_ALREADY_EXISTS)
- m = SH_JUSTOPEN;
- }
- if (shared_h)
- /* ok! */;
- else if (m != SH_JUSTOPEN)
- api_fatal ("CreateFileMapping %s, %E. Terminating.", mapname);
- else
- return NULL;
- }
-
- shared = (shared_info *)
- MapViewOfFileEx (shared_h, access, 0, 0, 0, addr);
-
- if (!shared && addr)
- {
- /* Probably win95, so try without specifying the address. */
- shared = (shared_info *) MapViewOfFileEx (shared_h,
- FILE_MAP_READ|FILE_MAP_WRITE,
- 0, 0, 0, NULL);
-#ifdef DEBUGGING
- if (wincap.is_winnt ())
- system_printf ("relocating shared object %s(%d) from %p to %p on Windows NT", name, n, addr, shared);
-#endif
- offsets[0] = 0;
- }
-
- if (!shared)
- api_fatal ("MapViewOfFileEx '%s'(%p), %E. Terminating.", mapname, shared_h);
-
- if (m == SH_USER_SHARED && offsets[0] && wincap.needs_memory_protection ())
- {
- ptrdiff_t delta = (caddr_t) shared - (caddr_t) off_addr (0);
- offsets[0] = (caddr_t) shared - (caddr_t) cygwin_hmodule;
- for (int i = SH_USER_SHARED + 1; i < SH_TOTAL_SIZE; i++)
- {
- unsigned size = offsets[i + 1] - offsets[i];
- offsets[i] += delta;
- if (!VirtualAlloc (off_addr (i), size, MEM_RESERVE, PAGE_NOACCESS))
- continue; /* oh well */
- }
- offsets[SH_TOTAL_SIZE] += delta;
- }
-
- debug_printf ("name %s, n %d, shared %p (wanted %p), h %p", mapname, n, shared, addr, shared_h);
-
- return shared;
-}
-
-void
-user_shared_initialize (bool reinit)
-{
- char name[UNLEN + 1] = ""; /* Large enough for SID */
-
- if (reinit)
- {
- if (!UnmapViewOfFile (user_shared))
- debug_printf("UnmapViewOfFile %E");
- if (!ForceCloseHandle (cygwin_user_h))
- debug_printf("CloseHandle %E");
- cygwin_user_h = NULL;
- }
-
- if (!cygwin_user_h)
- cygheap->user.get_windows_id (name);
-
- shared_locations sh_user_shared = SH_USER_SHARED;
- user_shared = (user_info *) open_shared (name, USER_VERSION,
- cygwin_user_h, sizeof (user_info),
- sh_user_shared, &sec_none);
- debug_printf ("opening user shared for '%s' at %p", name, user_shared);
- ProtectHandleINH (cygwin_user_h);
- debug_printf ("user shared version %x", user_shared->version);
-
- DWORD sversion = (DWORD) InterlockedExchange ((LONG *) &user_shared->version, USER_VERSION_MAGIC);
- /* Initialize the Cygwin per-user shared, if necessary */
- if (!sversion)
- {
- debug_printf ("initializing user shared");
- user_shared->mountinfo.init (); /* Initialize the mount table. */
- user_shared->delqueue.init (); /* Initialize the queue of deleted files. */
- user_shared->cb = sizeof (*user_shared);
- }
- else
- {
- while (!user_shared->cb)
- low_priority_sleep (0); // Should be hit only very very rarely
- if (user_shared->version != sversion)
- multiple_cygwin_problem ("user shared memory version", user_shared->version, sversion);
- else if (user_shared->cb != sizeof (*user_shared))
- multiple_cygwin_problem ("user shared memory size", user_shared->cb, sizeof (*user_shared));
- }
-}
-
-void
-shared_info::initialize ()
-{
- DWORD sversion = (DWORD) InterlockedExchange ((LONG *) &version, SHARED_VERSION_MAGIC);
- if (sversion)
- {
- if (sversion != SHARED_VERSION_MAGIC)
- {
- InterlockedExchange ((LONG *) &version, sversion);
- multiple_cygwin_problem ("system shared memory version", sversion, SHARED_VERSION_MAGIC);
- }
- while (!cb)
- low_priority_sleep (0); // Should be hit only very very rarely
- }
-
- heap_init ();
-
- if (!sversion)
- {
- tty.init (); /* Initialize tty table. */
- cb = sizeof (*this); /* Do last, after all shared memory initialization */
- }
-
- if (cb != SHARED_INFO_CB)
- system_printf ("size of shared memory region changed from %u to %u",
- SHARED_INFO_CB, cb);
-}
-
-void __stdcall
-memory_init ()
-{
- getpagesize ();
-
- /* Initialize the Cygwin heap, if necessary */
- if (!cygheap)
- {
- cygheap_init ();
- cygheap->user.init ();
- }
-
- cygwin_shared = &cygwin_shared_area;
- cygwin_shared->initialize ();
-
- user_shared_initialize (false);
- mtinfo_init ();
-}
-
-unsigned
-shared_info::heap_slop_size ()
-{
- if (!heap_slop)
- {
- /* Fetch from registry, first user then local machine. */
- for (int i = 0; i < 2; i++)
- {
- reg_key reg (i, KEY_READ, NULL);
-
- if ((heap_slop = reg.get_int ("heap_slop_in_mb", 0)))
- break;
- heap_slop = wincap.heapslop ();
- }
-
- if (heap_slop < 0)
- heap_slop = 0;
- else
- heap_slop <<= 20;
- }
-
- return heap_slop;
-}
-
-unsigned
-shared_info::heap_chunk_size ()
-{
- if (!heap_chunk)
- {
- /* Fetch from registry, first user then local machine. */
- for (int i = 0; i < 2; i++)
- {
- reg_key reg (i, KEY_READ, NULL);
-
- /* Note that reserving a huge amount of heap space does not result in
- the use of swap since we are not committing it. */
- /* FIXME: We should not be restricted to a fixed size heap no matter
- what the fixed size is. */
-
- if ((heap_chunk = reg.get_int ("heap_chunk_in_mb", 0)))
- break;
- heap_chunk = 384; /* Default */
- }
-
- if (heap_chunk < 4)
- heap_chunk = 4 * 1024 * 1024;
- else
- heap_chunk <<= 20;
- if (!heap_chunk)
- heap_chunk = 384 * 1024 * 1024;
- }
-
- return heap_chunk;
-}
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