X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/fe3189de0468ef6e507e999ac900151e5aeee826..38ae783db781810a19b3103bb55c81ea70e7d952:/Pooling.hpp

diff --git a/Pooling.hpp b/Pooling.hpp
index ea9f995..bd37c5c 100644
--- a/Pooling.hpp
+++ b/Pooling.hpp
@@ -22,55 +22,180 @@
 #ifndef CYCRIPT_POOLING_HPP
 #define CYCRIPT_POOLING_HPP
 
-#include <apr_pools.h>
-#include <apr_strings.h>
+#include <cstdarg>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+#include <algorithm>
+
+#include <stdint.h>
 
 #include "Exception.hpp"
 #include "Local.hpp"
 #include "Standard.hpp"
 
-#include <cstdlib>
-
-_finline void *operator new(size_t size, apr_pool_t *pool) {
-    return apr_palloc(pool, size);
-}
-
-_finline void *operator new [](size_t size, apr_pool_t *pool) {
-    return apr_palloc(pool, size);
-}
+class CYPool;
+_finline void *operator new(size_t size, CYPool &pool);
+_finline void *operator new [](size_t size, CYPool &pool);
 
 class CYPool {
   private:
-    apr_pool_t *pool_;
+    uint8_t *data_;
+    size_t size_;
+
+    struct Cleaner {
+        Cleaner *next_;
+        void (*code_)(void *);
+        void *data_;
+
+        Cleaner(Cleaner *next, void (*code)(void *), void *data) :
+            next_(next),
+            code_(code),
+            data_(data)
+        {
+        }
+    } *cleaner_;
+
+    static _finline size_t align(size_t size) {
+        // XXX: alignment is more complex than this
+        return (size + 7) & ~0x3;
+    }
+
+    CYPool(const CYPool &);
 
   public:
-    CYPool() {
-        _aprcall(apr_pool_create(&pool_, NULL));
+    CYPool() :
+        data_(NULL),
+        size_(0),
+        cleaner_(NULL)
+    {
     }
 
     ~CYPool() {
-        apr_pool_destroy(pool_);
+        for (Cleaner *cleaner(cleaner_); cleaner != NULL; ) {
+            Cleaner *next(cleaner->next_);
+            (*cleaner->code_)(cleaner->data_);
+            cleaner = next;
+        }
+    }
+
+    template <typename Type_>
+    Type_ *malloc(size_t size) {
+        size = align(size);
+
+        if (size > size_) {
+            // XXX: is this an optimal malloc size?
+            size_ = std::max<size_t>(size, size + align(sizeof(Cleaner)));
+            data_ = reinterpret_cast<uint8_t *>(::malloc(size_));
+            atexit(free, data_);
+            _assert(size <= size_);
+        }
+
+        void *data(data_);
+        data_ += size;
+        size_ -= size;
+        return reinterpret_cast<Type_ *>(data);
+    }
+
+    char *strdup(const char *data) {
+        return reinterpret_cast<char *>(memdup(data, strlen(data) + 1));
+    }
+
+    void *memdup(const void *data, size_t size) {
+        void *copy(malloc<void>(size));
+        memcpy(copy, data, size);
+        return copy;
+    }
+
+    char *strndup(const char *data, size_t size) const {
+        return strmemdup(data, strnlen(data, size));
     }
 
-    void Clear() {
-        apr_pool_clear(pool_);
+    char *strmemdup(const char *data, size_t size) const {
+        char *copy(new char[size + 1]);
+        memcpy(copy, data, size);
+        copy[size] = '\0';
+        return copy;
     }
 
-    operator apr_pool_t *() const {
-        return pool_;
+    // XXX: this could be made much more efficient
+    __attribute__((__sentinel__))
+    char *strcat(const char *data, ...) {
+        size_t size(strlen(data)); {
+            va_list args;
+            va_start(args, data);
+
+            while (const char *arg = va_arg(args, const char *))
+                size += strlen(arg);
+
+            va_end(args);
+        }
+
+        char *copy(malloc<char>(size + 1)); {
+            va_list args;
+            va_start(args, data);
+
+            size_t offset(strlen(data));
+            memcpy(copy, data, offset);
+
+            while (const char *arg = va_arg(args, const char *)) {
+                size_t size(strlen(arg));
+                memcpy(copy + offset, arg, size);
+                offset += size;
+            }
+
+            va_end(args);
+        }
+
+        copy[size] = '\0';
+        return copy;
     }
 
-    char *operator ()(const char *data) const {
-        return apr_pstrdup(pool_, data);
+    // XXX: most people using this might should use sprintf
+    char *itoa(long value) {
+        return sprintf(16, "%ld", value);
     }
 
-    char *operator ()(const char *data, size_t size) const {
-        return apr_pstrndup(pool_, data, size);
+    __attribute__((__format__(__printf__, 3, 4)))
+    char *sprintf(size_t size, const char *format, ...) {
+        va_list args;
+        va_start(args, format);
+        char *copy(vsprintf(size, format, args));
+        va_end(args);
+        return copy;
     }
+
+    char *vsprintf(size_t size, const char *format, va_list args) {
+        va_list copy;
+        va_copy(copy, args);
+        char buffer[size];
+        int writ(vsnprintf(buffer, size, format, copy));
+        va_end(copy);
+        _assert(writ >= 0);
+
+        if (size_t(writ) >= size)
+            return vsprintf(writ + 1, format, args);
+        return strmemdup(buffer, writ);
+    }
+
+    void atexit(void (*code)(void *), void *data = NULL);
 };
 
+_finline void *operator new(size_t size, CYPool &pool) {
+    return pool.malloc<void>(size);
+}
+
+_finline void *operator new [](size_t size, CYPool &pool) {
+    return pool.malloc<void>(size);
+}
+
+_finline void CYPool::atexit(void (*code)(void *), void *data) {
+    cleaner_ = new(*this) Cleaner(cleaner_, code, data);
+}
+
 struct CYData {
-    apr_pool_t *pool_;
+    CYPool *pool_;
     unsigned count_;
 
     CYData() :
@@ -78,29 +203,33 @@ struct CYData {
     {
     }
 
+    CYData(CYPool &pool) :
+        pool_(&pool),
+        count_(_not(unsigned))
+    {
+    }
+
     virtual ~CYData() {
     }
 
-    static void *operator new(size_t size, apr_pool_t *pool) {
-        void *data(apr_palloc(pool, size));
-        reinterpret_cast<CYData *>(data)->pool_ = pool;
+    static void *operator new(size_t size, CYPool &pool) {
+        void *data(pool.malloc<void>(size));
+        reinterpret_cast<CYData *>(data)->pool_ = &pool;
         return data;
     }
 
     static void *operator new(size_t size) {
-        apr_pool_t *pool;
-        _aprcall(apr_pool_create(&pool, NULL));
-        return operator new(size, pool);
+        return operator new(size, *new CYPool());
     }
 
     static void operator delete(void *data) {
-        apr_pool_destroy(reinterpret_cast<CYData *>(data)->pool_);
+        delete reinterpret_cast<CYData *>(data)->pool_;
     }
 };
 
 template <typename Type_>
 struct CYPoolAllocator {
-    apr_pool_t *pool_;
+    CYPool *pool_;
 
     typedef Type_ value_type;
     typedef value_type *pointer;
@@ -122,7 +251,7 @@ struct CYPoolAllocator {
     }
 
     pointer allocate(size_type size, const void *hint = 0) {
-        return reinterpret_cast<pointer>(apr_palloc(pool_, size));
+        return pool_->malloc<value_type>(size);
     }
 
     void deallocate(pointer data, size_type size) {
@@ -156,17 +285,17 @@ class CYLocalPool :
     public CYPool
 {
   private:
-    CYLocal<apr_pool_t> local_;
+    CYLocal<CYPool> local_;
 
   public:
     CYLocalPool() :
         CYPool(),
-        local_(operator apr_pool_t *())
+        local_(this)
     {
     }
 };
 
 #define $pool \
-    CYLocal<apr_pool_t>::Get()
+    (*CYLocal<CYPool>::Get())
 
 #endif/*CYCRIPT_POOLING_HPP*/