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| 116 | unsigned header_length; /* size of aio_ring */ |
116 | unsigned header_length; /* size of aio_ring */ |
| 117 | |
117 | |
| 118 | struct io_event io_events[0]; |
118 | struct io_event io_events[0]; |
| 119 | }; |
119 | }; |
| 120 | |
120 | |
| 121 | /* |
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| 122 | * define some syscall wrappers for common architectures |
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| 123 | * this is mostly for nice looks during debugging, not performance. |
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| 124 | * our syscalls return < 0, not == -1, on error. which is good |
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| 125 | * enough for linux aio. |
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| 126 | * TODO: arm is also common nowadays, maybe even mips and x86 |
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| 127 | * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove... |
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| 128 | */ |
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| 129 | #if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__ |
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| 130 | /* the costly errno access probably kills this for size optimisation */ |
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| 131 | |
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| 132 | #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5) \ |
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| 133 | ({ \ |
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| 134 | long res; \ |
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| 135 | register unsigned long r5 __asm__ ("r8" ); \ |
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| 136 | register unsigned long r4 __asm__ ("r10"); \ |
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| 137 | register unsigned long r3 __asm__ ("rdx"); \ |
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| 138 | register unsigned long r2 __asm__ ("rsi"); \ |
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| 139 | register unsigned long r1 __asm__ ("rdi"); \ |
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| 140 | if (narg >= 5) r5 = (unsigned long)(arg5); \ |
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| 141 | if (narg >= 4) r4 = (unsigned long)(arg4); \ |
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| 142 | if (narg >= 3) r3 = (unsigned long)(arg3); \ |
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| 143 | if (narg >= 2) r2 = (unsigned long)(arg2); \ |
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| 144 | if (narg >= 1) r1 = (unsigned long)(arg1); \ |
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| 145 | __asm__ __volatile__ ( \ |
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| 146 | "syscall\n\t" \ |
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| 147 | : "=a" (res) \ |
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| 148 | : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \ |
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| 149 | : "cc", "r11", "cx", "memory"); \ |
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| 150 | errno = -res; \ |
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| 151 | res; \ |
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| 152 | }) |
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| 153 | |
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| 154 | #endif |
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| 155 | |
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| 156 | #ifdef ev_syscall |
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| 157 | #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0 |
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| 158 | #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0) |
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| 159 | #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0) |
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| 160 | #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0) |
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| 161 | #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0) |
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| 162 | #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5) |
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| 163 | #else |
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| 164 | #define ev_syscall0(nr) syscall (nr) |
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| 165 | #define ev_syscall1(nr,arg1) syscall (nr, arg1) |
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| 166 | #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2) |
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| 167 | #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3) |
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| 168 | #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4) |
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| 169 | #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5) |
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| 170 | #endif |
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| 171 | |
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| 172 | inline_size |
121 | inline_size |
| 173 | int |
122 | int |
| 174 | evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp) |
123 | evsys_io_setup (unsigned nr_events, aio_context_t *ctx_idp) |
| 175 | { |
124 | { |
| 176 | return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp); |
125 | return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp); |
