62 lines
1.1 KiB
C
62 lines
1.1 KiB
C
#ifndef libc_h__
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#define libc_h__
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// 定义设备文件
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typedef struct
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{
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const char *name;
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int (*open)(void);
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int (*close)(void);
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int (*putc)(int);
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int (*getc)(void);
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int (*write)(const void *,int);
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int (*read)(void *,int);
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}libc_device_file;
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// 使用这个宏用于初始化
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#define extern_device(name_,putc_,getc_,write_,read_)\
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const char __libc_##name_[] __attribute__((section(".name"))) = #name_;\
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__attribute__((used,section(".libc_dev"))) const libc_device_file __libc_dev_##name_ =\
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{\
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.name=__libc_##name_,\
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.putc=putc_,\
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.getc=getc_,\
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.write=write_,\
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.read=read_,\
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};
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// 使用这个宏用于初始化,包括打开关闭函数
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#define extern_device2(name_,open_,close_,putc_,getc_,write_,read_)\
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const char __libc_##name_[] __attribute__((section(".name"))) = #name_;\
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__attribute__((used,section(".libc_dev"))) const libc_device_file __libc_dev_##name_ =\
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{\
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.name=__libc_##name_,\
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.open=open_,\
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.close=close_,\
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.putc=putc_,\
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.getc=getc_,\
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.write=write_,\
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.read=read_,\
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};
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#define dev(name_) __libc_dev_##name_
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const libc_device_file *libc_find_dev(const char *name);
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#endif
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