1 files changed, 87 insertions, 0 deletions
diff --git a/src/libpcp/src/desc.c b/src/libpcp/src/desc.c
new file mode 100644
index 0000000..d1dd624
--- /dev/null
+++ b/src/libpcp/src/desc.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 1995 Silicon Graphics, Inc.  All Rights Reserved.
+ * 
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ * 
+ * This library 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 Lesser General Public
+ * License for more details.
+ */
+
+#include "pmapi.h"
+#include "impl.h"
+#include "pmda.h"
+#include "internal.h"
+
+int
+pmLookupDesc(pmID pmid, pmDesc *desc)
+{
+    int		n;
+    __pmContext	*ctxp;
+    __pmPDU	*pb;
+
+    if ((n = pmWhichContext()) < 0)
+	goto done;
+    if ((ctxp = __pmHandleToPtr(n)) == NULL) {
+	n = PM_ERR_NOCONTEXT;
+	goto done;
+    }
+
+    if (ctxp->c_type == PM_CONTEXT_HOST) {
+	PM_LOCK(ctxp->c_pmcd->pc_lock);
+	if ((n = __pmSendDescReq(ctxp->c_pmcd->pc_fd, __pmPtrToHandle(ctxp), pmid)) < 0)
+	    n = __pmMapErrno(n);
+	else {
+	    int		pinpdu;
+	    pinpdu = n = __pmGetPDU(ctxp->c_pmcd->pc_fd, ANY_SIZE,
+				    ctxp->c_pmcd->pc_tout_sec, &pb);
+	    if (n == PDU_DESC)
+		n = __pmDecodeDesc(pb, desc);
+	    else if (n == PDU_ERROR)
+		__pmDecodeError(pb, &n);
+	    else if (n != PM_ERR_TIMEOUT)
+		n = PM_ERR_IPC;
+	    if (pinpdu > 0)
+		__pmUnpinPDUBuf(pb);
+	}
+	PM_UNLOCK(ctxp->c_pmcd->pc_lock);
+    }
+    else if (ctxp->c_type == PM_CONTEXT_LOCAL) {
+	int		ctx = n;
+	__pmDSO		*dp;
+	if (PM_MULTIPLE_THREADS(PM_SCOPE_DSO_PMDA))
+	    /* Local context requires single-threaded applications */
+	    n = PM_ERR_THREAD;
+	else if ((dp = __pmLookupDSO(((__pmID_int *)&pmid)->domain)) == NULL)
+	    n = PM_ERR_NOAGENT;
+	else {
+	    if (dp->dispatch.comm.pmda_interface >= PMDA_INTERFACE_5)
+		dp->dispatch.version.four.ext->e_context = ctx;
+	    n = dp->dispatch.version.any.desc(pmid, desc, dp->dispatch.version.any.ext);
+	}
+    }
+    else {
+	/* assume PM_CONTEXT_ARCHIVE */
+	n = __pmLogLookupDesc(ctxp->c_archctl->ac_log, pmid, desc);
+    }
+
+    if (n == PM_ERR_PMID || n == PM_ERR_PMID_LOG || n == PM_ERR_NOAGENT) {
+	int		sts;
+	/*
+	 * check for derived metric ... keep error status from above
+	 * unless we have success with the derived metrics
+	 */
+	sts = __dmdesc(ctxp, pmid, desc);
+	if (sts >= 0)
+	    n = sts;
+    }
+    PM_UNLOCK(ctxp->c_lock);
+
+done:
+    return n;
+}
+