From 8a6d1e4074bbe26685f8c0ca6efef97d99680afb Mon Sep 17 00:00:00 2001
From: "@syxhe" <https://t.me/syxhe>
Date: Wed, 7 May 2025 22:32:28 -0500
Subject: Fucking annoying memory leak

---
 src/main.c | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 157 insertions(+), 2 deletions(-)

diff --git a/src/main.c b/src/main.c
index e08b964..c885c5e 100755
--- a/src/main.c
+++ b/src/main.c
@@ -12,6 +12,7 @@
 #include <sys/types.h>
 #include <string.h>
 #include <stdio.h>
+#include <threads.h>
 
 
 void * xcalloc(size_t nmemb, size_t size) {
@@ -99,10 +100,24 @@ void stack_free(stack *st) {
     return;
 }
 
+int stack_getsize(stack * const st) {
+    if(!st)
+        return -1;
+
+    return st->size;
+}
+
+int stack_hasroom(stack * const st) {
+    if(!st)
+        return -1;
+
+    return (st->used < st->size);
+}
+
 int stack_push(stack *st, gdata *data) {
     if(!st || !data)
         return -1;
-    if(st->used == st->size)
+    if(!stack_hasroom(st))
         return 0;
 
     st->arr[st->used++] = data;
@@ -111,7 +126,17 @@ int stack_push(stack *st, gdata *data) {
 }
 
 int stack_pushd(stack *st, void *data, fcallback fcb) {
-    return stack_push(st, gdata_init(data, fcb));
+    if(!st)
+        return -1;
+    if(!stack_hasroom(st))
+        return 0;
+    
+    gdata *gd = gdata_init(data, fcb);
+    int retval = stack_push(st, gd);
+    if(!(retval > 0))
+        gdata_free(gd);
+
+    return retval;
 }
 
 gdata * stack_pop(stack *st) {
@@ -134,6 +159,129 @@ void * stack_popd(stack *st) {
 
 
 
+typedef struct cstack {
+    stack *stack;
+    mtx_t mutex;
+    cnd_t cond;
+    unsigned char canceled;
+} cstack;
+
+cstack * cstack_init(int size) {
+    if(size < 1)
+        return NULL;
+
+    cstack *cs = xcalloc(1, sizeof(*cs));
+    cs->canceled = 0;
+    cs->stack = stack_init(size);
+    mtx_init(&cs->mutex, mtx_plain);
+    cnd_init(&cs->cond);
+
+    return cs;
+}
+
+int cstack_cancel(cstack *cs) {
+    if(!cs)
+        return -1;
+
+    mtx_lock(&cs->mutex);
+    cs->canceled = 1;
+    mtx_unlock(&cs->mutex);
+    cnd_broadcast(&cs->cond);
+
+    return 0;
+}
+
+void cstack_free(cstack *cs) {
+    if(!cs)
+        return;
+
+    cstack_cancel(cs);
+    stack_free(cs->stack);
+    mtx_destroy(&cs->mutex);
+    cnd_destroy(&cs->cond);
+
+    return;
+}
+
+int cstack_push(cstack *cs, gdata *data) {
+    if(!cs || !data)
+        return -1;
+
+    mtx_lock(&cs->mutex);
+    stack_push(cs->stack, data);
+    mtx_unlock(&cs->mutex);
+    cnd_signal(&cs->cond);
+
+    return 0;
+}
+
+int cstack_pushd(cstack *cs, void *data, fcallback fcb) {
+    if(!cs)
+        return -1;
+
+    mtx_lock(&cs->mutex);
+    stack_pushd(cs->stack, data, fcb);
+    mtx_unlock(&cs->mutex);
+    cnd_signal(&cs->cond);
+
+    return 0;
+}
+
+gdata * cstack_pop(cstack *cs) {
+    if(!cs)
+        return NULL;
+
+    gdata *gd = NULL;
+    int csize = -1;
+    
+    mtx_lock(&cs->mutex);
+    
+    // Wait until there's data to pop or the thing gets canceled
+    for(; (csize = stack_getsize(cs->stack)) == 0 || !cs->canceled;)
+        cnd_wait(&cs->cond, &cs->mutex);
+
+    // If the stack was canceled, or there's an error, exit
+    if(cs->canceled || csize < 0)
+        thrd_exit(-1);
+
+    // Otherwise, there's data, of which pop it to gd
+    gd = stack_pop(cs->stack);
+
+    mtx_unlock(&cs->mutex);
+
+    return gd;
+}
+
+void * cstack_popd(cstack *cs) {
+    if(!cs)
+        return NULL;
+
+    gdata *gd = NULL;
+    int csize = -1;
+    
+    mtx_lock(&cs->mutex);
+    
+    // Wait until there's data to pop or the thing gets canceled
+    for(; (csize = stack_getsize(cs->stack)) == 0 || !cs->canceled;)
+        cnd_wait(&cs->cond, &cs->mutex);
+
+    // If the stack was canceled, or there's an error, exit
+    if(cs->canceled || csize < 0)
+        thrd_exit(-1);
+
+    // Otherwise, there's data, of which pop it to gd
+    gd = stack_pop(cs->stack);
+
+    mtx_unlock(&cs->mutex);
+
+    void *realdata = NULL;
+    gdata_destruct(gd, &realdata);
+
+    return realdata;
+}
+
+
+
 int main() {
     // stack *st = stack_init(10);
     // stack_pushd(st, (void*)10, NULL);
@@ -147,6 +295,13 @@ int main() {
 
     // stack_free(st);
 
+    cstack *cst = cstack_init(10);
+    cstack_pushd(cst, (void*)10, NULL);
+    cstack_pushd(cst, (void*)11, NULL);
+    cstack_pushd(cst, (void*)12, NULL);
+    cstack_pushd(cst, (void*)strdup("This is some data"), free);
+
+    cstack_free(cst);
 
     return 0;
 }
\ No newline at end of file
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