Added cygwin support.

Patch by Cygwin Ports maintainer <yselkowitz@users.sourceforge.net>.
See #578890.

sysdeps/cygwin/procmap.c

@@ -0,0 +1,162 @@
+/* Copyright (C) 1998-99 Martin Baulig
+   This file is part of LibGTop 1.0.
+
+   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
+
+   LibGTop is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License,
+   or (at your option) any later version.
+
+   LibGTop is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with LibGTop; see the file COPYING. If not, write to the
+   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+
+#include <config.h>
+#include <glib.h>
+
+#include <glibtop.h>
+#include <glibtop/error.h>
+#include <glibtop/procmap.h>
+
+#include <stddef.h>
+
+#include "glibtop_private.h"
+
+#define MKDEV(ma,mi)    (((ma) << 20) | (mi))
+
+#define  MAPS_FILE "/proc/%u/maps"
+
+
+#define PROC_MAPS_FORMAT "%16" G_GINT64_MODIFIER "x-%16" G_GINT64_MODIFIER "x %4c %16" G_GINT64_MODIFIER "x %02hx:%02hx %" G_GINT64_MODIFIER "u%*[ ]%n"
+
+
+static const unsigned long _glibtop_sysdeps_proc_map =
+(1L << GLIBTOP_PROC_MAP_NUMBER) + (1L << GLIBTOP_PROC_MAP_TOTAL) +
+(1L << GLIBTOP_PROC_MAP_SIZE);
+
+static const unsigned long _glibtop_sysdeps_map_entry =
+(1L << GLIBTOP_MAP_ENTRY_START) + (1L << GLIBTOP_MAP_ENTRY_END) +
+(1L << GLIBTOP_MAP_ENTRY_OFFSET) + (1L << GLIBTOP_MAP_ENTRY_PERM) +
+(1L << GLIBTOP_MAP_ENTRY_INODE) + (1L << GLIBTOP_MAP_ENTRY_DEVICE) +
+(1L << GLIBTOP_MAP_ENTRY_FILENAME);
+
+
+/* Init function. */
+
+void
+_glibtop_init_proc_map_s (glibtop *server)
+{
+	server->sysdeps.proc_map = _glibtop_sysdeps_proc_map;
+}
+
+
+glibtop_map_entry *
+glibtop_get_proc_map_s (glibtop *server, glibtop_proc_map *buf,	pid_t pid)
+{
+	char procfilename[GLIBTOP_MAP_FILENAME_LEN+1];
+
+	/*
+	  default size of 100 maybe inaccurate.
+	  It's the average number of entry per process on my laptop
+	*/
+
+	GArray *entry_list = g_array_sized_new(FALSE, FALSE,
+					       sizeof(glibtop_map_entry),
+					       100);
+	FILE *maps;
+	const char *filename;
+	char *line = NULL;
+	size_t line_size = 0;
+
+	memset (buf, 0, sizeof (glibtop_proc_map));
+
+	filename = MAPS_FILE;
+
+	snprintf (procfilename, sizeof procfilename, filename, (unsigned)pid);
+
+	if((maps = fopen (procfilename, "r")) == NULL) {
+	  return (glibtop_map_entry*) g_array_free(entry_list, TRUE);
+	}
+
+	while(TRUE)
+	{
+		unsigned long perm;
+		guint len;
+		int line_end;
+
+		unsigned short dev_major, dev_minor;
+		guint64 start, end, offset, inode;
+		char flags[4];
+		char *filename;
+
+		glibtop_map_entry *entry;
+
+		if (getline(&line, &line_size, maps) == -1)
+			break;
+
+	new_entry_line:
+
+		if (sscanf(line, PROC_MAPS_FORMAT,
+			   &start, &end, flags, &offset,
+			   &dev_major, &dev_minor, &inode, &line_end) != 7)
+			continue;
+
+		filename = line + line_end;
+		g_strstrip(filename);
+
+		/* Compute access permissions. */
+		perm = 0;
+
+		if (flags [0] == 'r')
+			perm |= GLIBTOP_MAP_PERM_READ;
+
+		if (flags [1] == 'w')
+			perm |= GLIBTOP_MAP_PERM_WRITE;
+
+		if (flags [2] == 'x')
+			perm |= GLIBTOP_MAP_PERM_EXECUTE;
+
+		if (flags [3] == 's')
+			perm |= GLIBTOP_MAP_PERM_SHARED;
+		else if (flags [3] == 'p')
+			perm |= GLIBTOP_MAP_PERM_PRIVATE;
+
+		/*
+		  avoid copying the entry, grow by 1 and point to the last
+		  element.
+		*/
+		len = entry_list->len;
+		g_array_set_size(entry_list, len + 1);
+		entry = &g_array_index(entry_list, glibtop_map_entry, len);
+
+		entry->flags = _glibtop_sysdeps_map_entry;
+		entry->start = start;
+		entry->end = end;
+		entry->offset = offset;
+		entry->perm = perm;
+		entry->device = MKDEV(dev_major, dev_minor);
+		entry->inode = inode;
+		g_strlcpy(entry->filename, filename, sizeof entry->filename);
+	}
+
+eof:
+
+	free(line);
+	fclose (maps);
+
+	buf->flags = _glibtop_sysdeps_proc_map;
+
+	buf->number = entry_list->len;
+	buf->size = sizeof (glibtop_map_entry);
+	buf->total = buf->number * buf->size;
+
+	return (glibtop_map_entry*) g_array_free(entry_list, FALSE);
+}