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Support non-blocking i/o across platforms

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This change introduces new tests for `O_NONBLOCK` and `SOCK_NONBLOCK` to
confirm that non-blocking i/o is now working on all supported platforms,
including Windows. For example, you can now say on Windows, MacOS, etc.:

    socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);

To create a non-blocking IPv4 TCP socket. Or you can enable non-blocking
i/o on an existing socket / pipe / etc. file descriptor by calling fcntl

    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);

This functionality is polyfilled on older Linux kernels too, e.g. RHEL5.
Now that fcntl() support is much better the FIOCLEX / FIONCLEX polyfills
for ioctl() have been removed since they're ugly non-POSIX diameond APIs

This change fixes a weakness in kprintf() that was causing Windows trace
tools to frequently crash.
This commit is contained in:
Justine Tunney 2023-07-23 02:56:47 -07:00
parent 5c9e03e3e0
commit 1d4eb08fa1
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GPG key ID: BE714B4575D6E328
102 changed files with 678 additions and 331 deletions
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8
libc/nt/winsock.h
View file

@ -294,7 +294,7 @@ int32_t WSAStartup(uint16_t wVersionRequested, struct NtWsaData *lpWSAData)
paramsnonnull() dontdiscard;
int WSACleanup(void);
int WSAGetLastError(void);
int WSAGetLastError(void) nosideeffect;
void WSASetLastError(int);
int __sys_bind_nt(uint64_t, const void *, int);
@ -343,6 +343,12 @@ int64_t WSAAccept(uint64_t s, struct sockaddr *out_addr,
const uint32_t *opt_dwCallbackData)
paramsnonnull((2)) dontdiscard;
bool32 AcceptEx(int64_t sListenSocket, int64_t sAcceptSocket,
void *out_lpOutputBuffer /*[recvlen+local+remoteaddrlen]*/,
uint32_t dwReceiveDataLength, uint32_t dwLocalAddressLength,
uint32_t dwRemoteAddressLength, uint32_t *out_lpdwBytesReceived,
struct NtOverlapped *inout_lpOverlapped);
int WSASend(uint64_t s, const struct NtIovec *lpBuffers, uint32_t dwBufferCount,
uint32_t *opt_out_lpNumberOfBytesSent, uint32_t dwFlags,
struct NtOverlapped *opt_inout_lpOverlapped,