c - AIX 上的函数指针编译错误

Question

我正在尝试在 IBM AIX 中编译一些 C 代码，但它似乎在函数指针方面存在一些严重问题。

以下是一些无法编译的代码:

typedef int (*strategy_fn)(const unsigned short va_niveau_trace, const unsigned int va_indentation_trace, const char* va_finalstring);

typedef struct strategy_tab_item_
{
  TraceStrategy strategy;
  strategy_fn fn;
}strategy_tab_item, *strategy_tab_item_ptr;

const strategy_tab_item tab_strategy[] =
{
    {TRACE_NO_BUFFERING, trace_process_no_buffering},
    {TRACE_LOOSE_CURRENT, trace_process_loose_current},
    {TRACE_LOOSE_OLDEST, trace_process_loose_oldest},
    {TRACE_AUTO_SYNC, trace_process_auto_sync}
};

AIX 不支持上面代码中编写的 typedef(同时定义 2 个)，我将它们分开:

typedef struct strategy_tab_item_
{
  TraceStrategy strategy;
  strategy_fn fn;
} strategy_tab_item;

typedef struct strategy_tab_item_ *strategy_tab_item_ptr;

现在 strategy_fn 无法识别(语法错误)。

Answer 1

您引用的代码不完整。试试这个:

typedef int strategy_fn (const unsigned short va_niveau_trace, 
        const unsigned int va_indentation_trace,
        const char *va_finalstring);

strategy_fn trace_process_no_buffering,
            trace_process_loose_current,
            trace_process_loose_oldest,
            trace_process_auto_sync;

typedef enum TraceStrategy {
    TRACE_NO_BUFFERING,
    TRACE_LOOSE_CURRENT,
    TRACE_LOOSE_OLDEST,
    TRACE_AUTO_SYNC
} TraceStrategy;

typedef struct strategy_tab_item_
{
  TraceStrategy strategy;
  strategy_fn *fn;
} strategy_tab_item, *strategy_tab_item_ptr;

const strategy_tab_item tab_strategy[] =
{
    {TRACE_NO_BUFFERING, trace_process_no_buffering},
    {TRACE_LOOSE_CURRENT, trace_process_loose_current},
    {TRACE_LOOSE_OLDEST, trace_process_loose_oldest},
    {TRACE_AUTO_SYNC, trace_process_auto_sync}
};