--- /dev/null
+/* This file is part of the Linux Trace Toolkit viewer
+ * Copyright (C) 2003-2004 Michel Dagenais
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License Version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <lttv/hook.h>
+#include <ltt/compiler.h>
+#include <ltt/ltt.h>
+
+typedef struct _LttvHookClosure {
+ LttvHook hook;
+ void *hook_data;
+ LttvHookPrio prio;
+ guint ref_count;
+} LttvHookClosure;
+
+gint lttv_hooks_prio_compare(LttvHookClosure *a, LttvHookClosure *b)
+{
+ gint ret=0;
+ if(a->prio < b->prio) ret = -1;
+ else if(a->prio > b->prio) ret = 1;
+ return ret;
+}
+
+
+LttvHooks *lttv_hooks_new()
+{
+ return g_array_new(FALSE, FALSE, sizeof(LttvHookClosure));
+}
+
+
+void lttv_hooks_destroy(LttvHooks *h)
+{
+ g_log(G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, "lttv_hooks_destroy()");
+ g_array_free(h, TRUE);
+}
+
+
+void lttv_hooks_add(LttvHooks *h, LttvHook f, void *hook_data, LttvHookPrio p)
+{
+ LttvHookClosure *c, new_c;
+ guint i;
+
+ if(unlikely(h == NULL))g_error("Null hook added");
+
+ new_c.hook = f;
+ new_c.hook_data = hook_data;
+ new_c.prio = p;
+ new_c.ref_count = 1;
+
+ /* Preliminary check for duplication */
+ /* only hook and hook data is checked */
+ for(i = 0; i < h->len; i++) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ if(new_c.hook == c->hook && new_c.hook_data == c->hook_data) {
+ g_assert(new_c.prio == c->prio);
+ c->ref_count++;
+ return;
+ }
+ }
+
+
+ for(i = 0; i < h->len; i++) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ if(new_c.prio < c->prio) {
+ g_array_insert_val(h,i,new_c);
+ return;
+ }
+ }
+ if(i == h->len)
+ g_array_append_val(h,new_c);
+}
+
+/* lttv_hooks_add_list
+ *
+ * Adds a sorted list into another sorted list.
+ *
+ * Note : h->len is modified, but only incremented. This assures
+ * its coherence through the function.
+ *
+ * j is an index to the element following the last one added in the
+ * destination array.
+ */
+void lttv_hooks_add_list(LttvHooks *h, const LttvHooks *list)
+{
+ guint i,j,k;
+ LttvHookClosure *c;
+ const LttvHookClosure *new_c;
+
+ if(unlikely(list == NULL)) return;
+
+ for(i = 0, j = 0 ; i < list->len; i++) {
+ new_c = &g_array_index(list, LttvHookClosure, i);
+ gboolean found=FALSE;
+
+ /* Preliminary check for duplication */
+ /* only hook and hook data is checked, not priority */
+ for(k = 0; k < h->len; k++) {
+ c = &g_array_index(h, LttvHookClosure, k);
+ if(new_c->hook == c->hook && new_c->hook_data == c->hook_data) {
+ /* Found another identical entry : increment its ref_count and
+ * jump over the source index */
+ g_assert(new_c->prio == c->prio);
+ found=TRUE;
+ c->ref_count++;
+ break;
+ }
+ }
+
+ if(!found) {
+ /* If not found, add it to the destination array */
+ while(j < h->len) {
+ c = &g_array_index(h, LttvHookClosure, j);
+ if(new_c->prio < c->prio) {
+ g_array_insert_val(h,j,*new_c);
+ j++;
+ break;
+ }
+ else j++;
+ }
+ if(j == h->len) {
+ g_array_append_val(h,*new_c);
+ j++;
+ }
+ }
+ }
+}
+
+
+void *lttv_hooks_remove(LttvHooks *h, LttvHook f)
+{
+ unsigned i;
+
+ void *hook_data;
+
+ LttvHookClosure *c;
+
+ for(i = 0 ; i < h->len ; i++) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ if(c->hook == f) {
+ if(c->ref_count == 1) {
+ hook_data = c->hook_data;
+ lttv_hooks_remove_by_position(h, i);
+ return hook_data;
+ } else {
+ g_assert(c->ref_count != 0);
+ c->ref_count--;
+ return NULL; /* We do not want anyone to free a hook_data
+ still referenced */
+ }
+ }
+ }
+ return NULL;
+}
+
+
+void lttv_hooks_remove_data(LttvHooks *h, LttvHook f, void *hook_data)
+{
+ unsigned i;
+
+ LttvHookClosure *c;
+
+ for(i = 0 ; i < h->len ; i++) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ if(c->hook == f && c->hook_data == hook_data) {
+ if(c->ref_count == 1) {
+ lttv_hooks_remove_by_position(h, i);
+ return;
+ } else {
+ g_assert(c->ref_count != 0);
+ c->ref_count--;
+ return;
+ }
+ }
+ }
+}
+
+
+void lttv_hooks_remove_list(LttvHooks *h, LttvHooks *list)
+{
+ guint i, j;
+
+ LttvHookClosure *c, *c_list;
+
+ if(list == NULL) return;
+ for(i = 0, j = 0 ; i < h->len && j < list->len ;) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ c_list = &g_array_index(list, LttvHookClosure, j);
+ if(c->hook == c_list->hook && c->hook_data == c_list->hook_data) {
+ if(c->ref_count == 1) {
+ lttv_hooks_remove_by_position(h, i);
+ } else {
+ g_assert(c->ref_count != 0);
+ c->ref_count--;
+ }
+ j++;
+ }
+ else i++;
+ }
+
+ /* Normally the hooks in h are ordered as in list. If this is not the case,
+ try harder here. */
+
+ if(unlikely(j < list->len)) {
+ for(; j < list->len ; j++) {
+ c_list = &g_array_index(list, LttvHookClosure, j);
+ lttv_hooks_remove_data(h, c_list->hook, c_list->hook_data);
+ }
+ }
+}
+
+
+unsigned lttv_hooks_number(LttvHooks *h)
+{
+ return h->len;
+}
+
+
+void lttv_hooks_get(LttvHooks *h, unsigned i, LttvHook *f, void **hook_data,
+ LttvHookPrio *p)
+{
+ LttvHookClosure *c;
+
+ if(unlikely(i >= h->len))
+ {
+ *f = NULL;
+ *hook_data = NULL;
+ *p = 0;
+ return;
+ }
+
+ c = &g_array_index(h, LttvHookClosure, i);
+ *f = c->hook;
+ *hook_data = c->hook_data;
+ *p = c->prio;
+}
+
+
+void lttv_hooks_remove_by_position(LttvHooks *h, unsigned i)
+{
+ g_array_remove_index(h, i);
+}
+
+gboolean lttv_hooks_call(LttvHooks *h, void *call_data)
+{
+ gboolean ret, sum_ret = FALSE;
+
+ LttvHookClosure *c;
+
+ guint i;
+
+ if(likely(h != NULL)) {
+ for(i = 0 ; i < h->len ; i++) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ ret = c->hook(c->hook_data,call_data);
+ sum_ret = sum_ret || ret;
+ }
+ }
+ return sum_ret;
+}
+
+
+gboolean lttv_hooks_call_check(LttvHooks *h, void *call_data)
+{
+ LttvHookClosure *c;
+
+ guint i;
+
+ for(i = 0 ; i < h->len ; i++) {
+ c = &g_array_index(h, LttvHookClosure, i);
+ if(unlikely(c->hook(c->hook_data,call_data))) return TRUE;
+ }
+ return FALSE;
+}
+
+/* Optimised for h1 == NULL, h2 != NULL. This is the case
+ * for optimised computation (with specific by id hooks, but
+ * no main hooks).
+ *
+ * The second case that should occur the most often is
+ * h1 != NULL , h2 == NULL.
+ */
+gint lttv_hooks_call_merge(LttvHooks *h1, void *call_data1,
+ LttvHooks *h2, void *call_data2)
+{
+ gint ret, sum_ret = 0;
+
+ LttvHookClosure *c1, *c2;
+
+ guint i, j;
+
+ if(unlikely(h1 != NULL)) {
+ if(unlikely(h2 != NULL)) {
+ for(i = 0, j = 0 ; i < h1->len && j < h2->len ;) {
+ c1 = &g_array_index(h1, LttvHookClosure, i);
+ c2 = &g_array_index(h2, LttvHookClosure, j);
+ if(c1->prio <= c2->prio) {
+ ret = c1->hook(c1->hook_data,call_data1);
+ sum_ret = sum_ret | ret;
+ i++;
+ }
+ else {
+ ret = c2->hook(c2->hook_data,call_data2);
+ sum_ret = sum_ret | ret;
+ j++;
+ }
+ }
+ /* Finish the last list with hooks left */
+ for(;i < h1->len; i++) {
+ c1 = &g_array_index(h1, LttvHookClosure, i);
+ ret = c1->hook(c1->hook_data,call_data1);
+ sum_ret = sum_ret | ret;
+ }
+ for(;j < h2->len; j++) {
+ c2 = &g_array_index(h2, LttvHookClosure, j);
+ ret = c2->hook(c2->hook_data,call_data2);
+ sum_ret = sum_ret | ret;
+ }
+ } else { /* h1 != NULL && h2 == NULL */
+ for(i = 0 ; i < h1->len ; i++) {
+ c1 = &g_array_index(h1, LttvHookClosure, i);
+ ret = c1->hook(c1->hook_data,call_data1);
+ sum_ret = sum_ret | ret;
+ }
+ }
+ } else if(likely(h2 != NULL)) { /* h1 == NULL && h2 != NULL */
+ for(j = 0 ; j < h2->len ; j++) {
+ c2 = &g_array_index(h2, LttvHookClosure, j);
+ ret = c2->hook(c2->hook_data,call_data2);
+ sum_ret = sum_ret | ret;
+ }
+ }
+
+ return sum_ret;
+}
+
+gboolean lttv_hooks_call_check_merge(LttvHooks *h1, void *call_data1,
+ LttvHooks *h2, void *call_data2)
+{
+ LttvHookClosure *c1, *c2;
+
+ guint i, j;
+
+ if(unlikely(h1 != NULL)) {
+ if(unlikely(h2 != NULL)) {
+ for(i = 0, j = 0 ; i < h1->len && j < h2->len ;) {
+ c1 = &g_array_index(h1, LttvHookClosure, i);
+ c2 = &g_array_index(h2, LttvHookClosure, j);
+ if(c1->prio <= c2->prio) {
+ if(c1->hook(c1->hook_data,call_data1)) return TRUE;
+ i++;
+ }
+ else {
+ if(c2->hook(c2->hook_data,call_data2)) return TRUE;
+ j++;
+ }
+ }
+ /* Finish the last list with hooks left */
+ for(;i < h1->len; i++) {
+ c1 = &g_array_index(h1, LttvHookClosure, i);
+ if(c1->hook(c1->hook_data,call_data1)) return TRUE;
+ }
+ for(;j < h2->len; j++) {
+ c2 = &g_array_index(h2, LttvHookClosure, j);
+ if(c2->hook(c2->hook_data,call_data2)) return TRUE;
+ }
+ } else { /* h2 == NULL && h1 != NULL */
+ for(i = 0 ; i < h1->len ; i++) {
+ c1 = &g_array_index(h1, LttvHookClosure, i);
+ if(c1->hook(c1->hook_data,call_data1)) return TRUE;
+ }
+ }
+ } else if(likely(h2 != NULL)) { /* h1 == NULL && h2 != NULL */
+ for(j = 0 ; j < h2->len ; j++) {
+ c2 = &g_array_index(h2, LttvHookClosure, j);
+ if(c2->hook(c2->hook_data,call_data2)) return TRUE;
+ }
+ }
+
+ return FALSE;
+
+}
+
+/* Two pointer arrays :
+ * * one indexed by id for quick search :
+ * size : max id
+ * typically 4 bytes * 256 facilities * 10 events = 10kbytes
+ * * another array that keeps a list of used numbers (for later deletion)
+ * size : number of ids used.
+ */
+
+LttvHooksById *lttv_hooks_by_id_new()
+{
+ LttvHooksById *h = g_new(LttvHooksById, 1);
+ h->index = g_ptr_array_sized_new(PREALLOC_EVENTS);
+ h->array = g_array_sized_new(FALSE, FALSE, sizeof(guint), PREALLOC_EVENTS);
+ return h;
+}
+
+
+void lttv_hooks_by_id_destroy(LttvHooksById *h)
+{
+ guint i;
+
+ for(i = 0 ; i < h->array->len ; i++) {
+ guint index = g_array_index(h->array, guint, i);
+ if(h->index->pdata[index] != NULL) { /* hook may have been removed */
+ lttv_hooks_destroy(h->index->pdata[index]);
+ h->index->pdata[index] = NULL; /* Must be there in case of
+ multiple addition of the same index */
+ }
+ }
+ g_ptr_array_free(h->index, TRUE);
+ g_array_free(h->array, TRUE);
+}
+
+/* Optimised for searching an existing hook */
+LttvHooks *lttv_hooks_by_id_find(LttvHooksById *h, unsigned id)
+{
+ if(unlikely(h->index->len <= id)) g_ptr_array_set_size(h->index, id + 1);
+ if(unlikely(h->index->pdata[id] == NULL)) {
+ h->index->pdata[id] = lttv_hooks_new();
+ g_array_append_val(h->array, id);
+ }
+ return h->index->pdata[id];
+}
+
+
+unsigned lttv_hooks_by_id_max_id(LttvHooksById *h)
+{
+ return h->index->len;
+}
+
+/* We don't bother removing the used slot array id : lttv_hooks_by_id_destroy is
+ * almost never called and is able to deal with used slot repetition. */
+void lttv_hooks_by_id_remove(LttvHooksById *h, unsigned id)
+{
+ if(likely(id < h->index->len && h->index->pdata[id] != NULL)) {
+ lttv_hooks_destroy((LttvHooks *)h->index->pdata[id]);
+ h->index->pdata[id] = NULL;
+ }
+}
+
+void lttv_hooks_by_id_copy(LttvHooksById *dest, LttvHooksById *src)
+{
+ guint i;
+
+ for(i = 0 ; i < src->array->len ; i++) {
+ guint index = g_array_index(src->array, guint, i);
+ LttvHooks *srch = lttv_hooks_by_id_find(src, index);
+ LttvHooks *desth = lttv_hooks_by_id_find(dest, index);
+ lttv_hooks_add_list(desth, srch);
+ }
+}
+
+LttvHooksByIdChannelArray *lttv_hooks_by_id_channel_new(void)
+{
+ LttvHooksByIdChannelArray *h = g_new(LttvHooksByIdChannelArray, 1);
+
+ h->array = g_array_new(FALSE, FALSE, sizeof(LttvHooksByIdChannel));
+ return h;
+}
+
+void lttv_hooks_by_id_channel_destroy(LttvHooksByIdChannelArray *h)
+{
+ LttvHooksByIdChannel *hid;
+ int i;
+
+ for (i = 0; i < h->array->len; i++) {
+ hid = &g_array_index(h->array, LttvHooksByIdChannel, i);
+ lttv_hooks_by_id_destroy(hid->hooks_by_id);
+ }
+ g_array_free(h->array, TRUE);
+ g_free(h);
+}
+
+static LttvHooksByIdChannel *lttv_hooks_by_id_channel_find_channel(
+ LttvHooksByIdChannelArray *h,
+ GQuark channel)
+{
+ LttvHooksByIdChannel *hid;
+ int i, found = 0;
+
+ for (i = 0; i < h->array->len; i++) {
+ hid = &g_array_index(h->array, LttvHooksByIdChannel, i);
+ if (hid->channel == channel)
+ found = 1;
+ break;
+ }
+ if (!found) {
+ g_array_set_size(h->array, h->array->len + 1);
+ hid = &g_array_index(h->array, LttvHooksByIdChannel, h->array->len - 1);
+ hid->channel = channel;
+ hid->hooks_by_id = lttv_hooks_by_id_new();
+ }
+ return hid;
+}
+
+/* get, or create if not found */
+LttvHooks *lttv_hooks_by_id_channel_find(LttvHooksByIdChannelArray *h,
+ GQuark channel, guint16 id)
+{
+ LttvHooksByIdChannel *hid;
+ hid = lttv_hooks_by_id_channel_find_channel(h, channel);
+ return lttv_hooks_by_id_find(hid->hooks_by_id, id);
+}
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