From: Richard W.M. Jones <"Richard W.M. Jones "> Date: Thu, 20 Dec 2007 16:55:46 +0000 (+0000) Subject: New exception Libvirt.Not_supported "function" X-Git-Tag: 1.0.4~96 X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=a8e571097acd0624c6803c878d09c930055cfd39;p=virt-top.git New exception Libvirt.Not_supported "function" * libvirt/libvirt.ml, libvirt/libvirt.mli, libvirt/libvirt_c.c: Change the ad-hoc "foo not supported" exception into a specific Libvirt.Not_supported "foo" exception. * virt-top/virt_top.ml: Change virt-top to understand new exception type. --- diff --git a/ChangeLog b/ChangeLog index 733e040..6393f1f 100644 --- a/ChangeLog +++ b/ChangeLog @@ -4,6 +4,11 @@ synchronous libvirt API calls, so that multithreaded OCaml programs can be used. * configure.ac: Version 0.4.0.0 for release. + * libvirt/libvirt.ml, libvirt/libvirt.mli, libvirt/libvirt_c.c: + Change the ad-hoc "foo not supported" exception into a + specific Libvirt.Not_supported "foo" exception. + * virt-top/virt_top.ml: Change virt-top to understand new + exception type. 2007-11-20 Richard Jones diff --git a/libvirt/libvirt.ml b/libvirt/libvirt.ml index 69e1c0d..6582874 100644 --- a/libvirt/libvirt.ml +++ b/libvirt/libvirt.ml @@ -401,10 +401,13 @@ struct end exception Virterror of Virterror.t +exception Not_supported of string (* Initialization. *) external c_init : unit -> unit = "ocaml_libvirt_init" let () = Callback.register_exception "ocaml_libvirt_virterror" (Virterror (Virterror.no_error ())); + Callback.register_exception + "ocaml_libvirt_not_supported" (Not_supported ""); c_init () diff --git a/libvirt/libvirt.mli b/libvirt/libvirt.mli index aa4b9f4..58198c8 100644 --- a/libvirt/libvirt.mli +++ b/libvirt/libvirt.mli @@ -550,12 +550,16 @@ exception Virterror of Virterror.t (** This exception can be raised by any library function that detects an error. To get a printable error message, call {!Virterror.to_string} on the content of this exception. +*) - Note that functions may also raise - [Invalid_argument "virFoo not supported"] - (where virFoo is the libvirt function name) if a function is - not supported at either compile or runtime. This applies to +exception Not_supported of string +(** + Functions may raise + [Not_supported "virFoo"] + (where [virFoo] is the libvirt function name) if a function is + not supported at either compile or run time. This applies to any libvirt function added after version 0.2.1. + See also [http://libvirt.org/hvsupport.html] *) diff --git a/libvirt/libvirt_c.c b/libvirt/libvirt_c.c index c568026..4ae121c 100644 --- a/libvirt/libvirt_c.c +++ b/libvirt/libvirt_c.c @@ -40,7 +40,8 @@ static char *Optstring_val (value strv); typedef value (*Val_ptr_t) (void *); static value Val_opt (void *ptr, Val_ptr_t Val_ptr); /*static value option_default (value option, value deflt);*/ -static value _raise_virterror (virConnectPtr conn, const char *fn); +static void _raise_virterror (virConnectPtr conn, const char *fn); +static void not_supported (const char *fn); static value Val_virterror (virErrorPtr err); /* Use this around synchronous libvirt API calls to release the OCaml @@ -61,9 +62,6 @@ static value Val_virterror (virErrorPtr err); #define CHECK_ERROR(cond, conn, fn) \ do { if (cond) _raise_virterror (conn, fn); } while (0) -#define NOT_SUPPORTED(fn) \ - caml_invalid_argument (fn " not supported") - /* For more about weak symbols, see: * http://kolpackov.net/pipermail/notes/2004-March/000006.html * We are using this to do runtime detection of library functions @@ -81,7 +79,7 @@ static value Val_virterror (virErrorPtr err); #ifdef HAVE_WEAK_SYMBOLS #define WEAK_SYMBOL_CHECK(sym) \ - do { if (!sym) NOT_SUPPORTED(#sym); } while (0) + do { if (!sym) not_supported(#sym); } while (0) #else #define WEAK_SYMBOL_CHECK(sym) #endif /* HAVE_WEAK_SYMBOLS */ @@ -338,7 +336,7 @@ ocaml_libvirt_connect_get_hostname (value connv) free (r); CAMLreturn (rv); #else - NOT_SUPPORTED ("virConnectGetHostname"); + not_supported ("virConnectGetHostname"); #endif } @@ -359,7 +357,7 @@ ocaml_libvirt_connect_get_uri (value connv) free (r); CAMLreturn (rv); #else - NOT_SUPPORTED ("virConnectGetURI"); + not_supported ("virConnectGetURI"); #endif } @@ -575,7 +573,7 @@ ocaml_libvirt_connect_node_get_free_memory (value connv) rv = caml_copy_int64 ((int64) r); CAMLreturn (rv); #else - NOT_SUPPORTED ("virNodeGetFreeMemory"); + not_supported ("virNodeGetFreeMemory"); #endif } @@ -604,7 +602,7 @@ ocaml_libvirt_connect_node_get_cells_free_memory (value connv, CAMLreturn (rv); #else - NOT_SUPPORTED ("virNodeGetCellsFreeMemory"); + not_supported ("virNodeGetCellsFreeMemory"); #endif } @@ -1014,7 +1012,7 @@ ocaml_libvirt_domain_get_scheduler_type (value domv) Store_field (rv, 1, nparams); CAMLreturn (rv); #else - NOT_SUPPORTED ("virDomainGetSchedulerType"); + not_supported ("virDomainGetSchedulerType"); #endif } @@ -1070,7 +1068,7 @@ ocaml_libvirt_domain_get_scheduler_parameters (value domv, value nparamsv) } CAMLreturn (rv); #else - NOT_SUPPORTED ("virDomainGetSchedulerParameters"); + not_supported ("virDomainGetSchedulerParameters"); #endif } @@ -1129,7 +1127,7 @@ ocaml_libvirt_domain_set_scheduler_parameters (value domv, value paramsv) CAMLreturn (Val_unit); #else - NOT_SUPPORTED ("virDomainSetSchedulerParameters"); + not_supported ("virDomainSetSchedulerParameters"); #endif } @@ -1360,7 +1358,7 @@ ocaml_libvirt_domain_migrate_native (value domv, value dconnv, value flagsv, val CAMLreturn (rv); #else /* virDomainMigrate not supported */ - NOT_SUPPORTED ("virDomainMigrate"); + not_supported ("virDomainMigrate"); #endif } @@ -1397,7 +1395,7 @@ ocaml_libvirt_domain_block_stats (value domv, value pathv) CAMLreturn (rv); #else - NOT_SUPPORTED ("virDomainBlockStats"); + not_supported ("virDomainBlockStats"); #endif } @@ -1429,7 +1427,7 @@ ocaml_libvirt_domain_interface_stats (value domv, value pathv) CAMLreturn (rv); #else - NOT_SUPPORTED ("virDomainInterfaceStats"); + not_supported ("virDomainInterfaceStats"); #endif } @@ -1784,7 +1782,7 @@ option_default (value option, value deflt) } #endif -static value +static void _raise_virterror (virConnectPtr conn, const char *fn) { CAMLparam0 (); @@ -1808,7 +1806,21 @@ _raise_virterror (virConnectPtr conn, const char *fn) caml_raise_with_arg (*caml_named_value ("ocaml_libvirt_virterror"), rv); /*NOTREACHED*/ - CAMLreturn (Val_unit); + CAMLreturn0; +} + +/* Raise an error if a function is not supported. */ +static void +not_supported (const char *fn) +{ + CAMLparam0 (); + CAMLlocal1 (fnv); + + fnv = caml_copy_string (fn); + caml_raise_with_arg (*caml_named_value ("ocaml_libvirt_not_supported"), fnv); + + /*NOTREACHED*/ + CAMLreturn0; } /* Convert the virErrorNumber, virErrorDomain and virErrorLevel enums diff --git a/virt-top/virt_top.ml b/virt-top/virt_top.ml index 4bce7dd..b3e2628 100644 --- a/virt-top/virt_top.ml +++ b/virt-top/virt_top.ml @@ -241,7 +241,7 @@ OPTIONS" in (* qemu:/// and other URIs didn't support virConnectGetHostname until * libvirt 0.3.3. Before that they'd throw a virterror. *) | Libvirt.Virterror _ - | Invalid_argument "virConnectGetHostname not supported" -> "unknown" in + | Libvirt.Not_supported "virConnectGetHostname" -> "unknown" in let libvirt_version = let v, _ = Libvirt.get_version () in @@ -433,12 +433,12 @@ let collect, clear_pcpu_display_data = let block_stats = try List.map (fun dev -> dev, D.block_stats dom dev) blkdevs with - | Invalid_argument "virDomainBlockStats not supported" + | Libvirt.Not_supported "virDomainBlockStats" | Libvirt.Virterror _ -> [] in let interface_stats = try List.map (fun dev -> dev, D.interface_stats dom dev) netifs with - | Invalid_argument "virDomainInterfaceStats not supported" + | Libvirt.Not_supported "virDomainInterfaceStats" | Libvirt.Virterror _ -> [] in let prev_info, prev_block_stats, prev_interface_stats =