Reuse of XPathNavigator instance is error-prone. Fixed bug #3705. This may significan...

[mono.git] / mono / io-layer / process-private.h

diff --git a/mono/io-layer/process-private.h b/mono/io-layer/process-private.h
index 77c121f5459b0c48b12c512b610a25b2fcb23c11..bdf6ce75a3f42a7e89c9f077e98cf813d101957c 100644 (file)
--- a/mono/io-layer/process-private.h
+++ b/mono/io-layer/process-private.h
@@ -15,12 +15,45 @@
 
 /* There doesn't seem to be a defined symbol for this */
 #define _WAPI_PROCESS_CURRENT (gpointer)0xFFFFFFFF
+
+/* This marks a system process that we don't have a handle on */
+/* FIXME: Cope with PIDs > sizeof guint */
+#define _WAPI_PROCESS_UNHANDLED (1 << (8*sizeof(pid_t)-1))
+#define _WAPI_PROCESS_UNHANDLED_PID_MASK (-1 & ~_WAPI_PROCESS_UNHANDLED)
+
 extern gpointer _wapi_process_duplicate (void);
 
 extern struct _WapiHandleOps _wapi_process_ops;
 
 #define _WAPI_PROC_NAME_MAX_LEN _POSIX_PATH_MAX
 
+/*
+ * MonoProcess describes processes we create.
+ * It contains a semaphore that can be waited on in order to wait
+ * for process termination. It's accessed in our SIGCHLD handler,
+ * when status is updated (and pid cleared, to not clash with 
+ * subsequent processes that may get executed).
+ */
+struct MonoProcess {
+       pid_t pid; /* the pid of the process. This value is only valid until the process has exited. */
+       MonoSemType exit_sem; /* this semaphore will be released when the process exits */
+       int status; /* the exit status */
+       gint32 handle_count; /* the number of handles to this mono_process instance */
+       /* we keep a ref to the creating _WapiHandle_process handle until
+        * the process has exited, so that the information there isn't lost.
+        * If we put the information there in this structure, it won't be
+        * available to other processes when using shared handles. */
+       gpointer handle;
+       struct MonoProcess *next;
+};
+
+
+/*
+ * _WapiHandle_process is a structure containing all the required information
+ * for process handling.
+ * The mono_process field is only present if this process has created
+ * the corresponding process.
+ */
 struct _WapiHandle_process
 {
        pid_t id;
@@ -31,10 +64,9 @@ struct _WapiHandle_process
        gchar proc_name[_WAPI_PROC_NAME_MAX_LEN];
        size_t min_working_set;
        size_t max_working_set;
-       gboolean waited;
+       gboolean exited;
+       pid_t self; /* mono_process is shared among processes, but only usable in the process that created it */
+       struct MonoProcess *mono_process;
 };
 
-extern void _wapi_process_reap (void);
-extern void _wapi_process_signal_self (void);
-
 #endif /* _WAPI_PROCESS_PRIVATE_H_ */